Owner of the Logitech G915 for almost 3 years and I will say that the keyboard could be the ideal keyboard for my needs, but it has some very important problems that even in a 50 euro keyboard cannot go unnoticed. The two biggest problems are that quite soon several switches started to make double presses (chatter/double type) and thus make it quite annoying to type. This specific problem is well known in this Logitech model and arises in most of them, so it is not about a defective part or batch. The only way to reduce the problem is to clean the switch with alcohol and blow to remove any dust, but it is a matter of time to happen again (I intentionally leave the 2 "nn", because I am writing from this specific keyboard and it is currently showing the problem I am describing). It is something that is not acceptable in any keyboard, let alone in a keyboard of such value. The second problem is that you cannot find keycaps in the market, so in case one breaks you have no choice. Second fault from Logitech which should at least officially sell spare parts so that users can keep the keyboard for longer.
On the positive side, it has a very discreet sound in typing and thus does not bother those around, a very good battery to the point where you forget to charge it, very convenient media keys, as well as the volume wheel. Excellent RGB backlight that can change theme per application/game. The keyboard really has everything I ask for, but the above problems make it "useless" for my needs. Finally, Logitech's software, while it has improved a lot in recent years, sometimes causes insecurity, as with every update it may create some problem (last time it needed a reinstall to work)

The keyboard has been in my possession for 10 days now. I cannot give a full opinion as it is too early, but I can definitely give an opinion on some things. Here we go.

POSITIVES

1. Sturdy keyboard. Logical considering the price, but sometimes the price doesn't matter in this case.
2. Indeed, it has a very good battery. Personally, I don't want all the lights, just a static color. Why do I say this? Through the Logitech application, you can do wonders. Depending on the lighting you set and how strong the lighting is, you will get the corresponding battery percentage. With my static lighting, it lasts about 80-90 hours, without lighting (difficult, of course, since you don't have visibility at night) 1000+ according to the company, although I haven't personally tested it.
3. I got it full size because I need the extra keys on the side as well as the number pad. But still, it is so compact that it looks small. In essence, it makes the desk look very clean, which is a big plus.
4. Flawless connectivity via USB. I bought a Bluetooth adapter just in case, since my computer doesn't have built-in Bluetooth, to have another way of connecting. Everything works perfectly.
5. The sound is also perfect, exactly what I needed. Not too much, not too little. It's the perfect balance.

NEGATIVES

1. When I use it for a long time and type, because my fingers sweat a little more, it might leave a slight mark on the keys. Fortunately, it cleans easily.
2. I don't have a problem with this since I specifically bought this version, but I have to mention it for those who might be bothered. The keyboard only has English characters, meaning it doesn't have the corresponding Greek letter below. If you know how to type on keyboards in general, you won't have a problem, but I'm mentioning it again for those who struggle.

Overall, a very good keyboard. Definitely expensive, and I was contemplating whether to buy it or not, but I decided to treat myself. As an ideal price, I would say around 180-190 euros (due to the wireless aspect). It's not for everyone's budget, but if you have the money, I believe it's worth giving it a chance.

I will come back in the future if I encounter any issues.

The keyboard is a masterpiece in terms of construction quality and key feel.
I was very skeptical before buying it because it is EXPENSIVE, and certainly not for everyone's budget.
But since I have used many keyboards in my hands, and I was looking for a 6-month change from a motospeed with blue switches, which tired me both in feel and noise, I decided to make the leap and spend six times more than what I was used to spending on keyboards.

I also took the risk of going for a TKL and wireless.
The lack of a numpad only costs me when typing codes and IPs, which doesn't happen very often, so we're good, I didn't expect it to be convenient, and the smaller size is actually very convenient for easier mouse movement.

The wireless is just a pleasant little comfort, since I don't move it, but let it be.
The battery lasts a very long time, even with prolonged use.

The lighting is good, but unfortunately the keys with extra characters are not illuminated on the extra characters...
Another positive is the volume control wheel, but I would have liked it to have some feedback and more resistance.

Also, the biggest negative is that it doesn't have USB Type-C but the older one...

I will not write about the positives of the keyboard because they have been extensively mentioned in dozens of reviews on the internet. I will mention 2 negative characteristics, the first of which I found in just 2 reviews and the second is not mentioned anywhere.
1. Unless someone remembers the position of all the keys, it is impossible to use the keyboard without backlighting. When it is turned off, the letters on the keys darken and are not distinguishable.
2. The technique used by Logitech to illuminate the keys with different colors and intensities causes the lighting to flicker. It uses bursts of intense light. Those who have eyes that perceive rapidly flashing lights (LED lights in new cars, LED lighting in homes, etc.) will have a major problem with the keyboard lighting as the letters on the keyboard do not stand out with every eye movement. Because I have also used other keyboards with colored backlighting (at a much lower price) including Logitech, I consider it disappointing for such an expensive and generally well-made keyboard to have such an issue.

As the owner of the previous wireless mechanical keyboard from Logitech G613, I have to say that this keyboard is a significant improvement. I have had it for about 2 months and I am completely satisfied.

Among the positives, I definitely include the switch change. The Romer-G mechanical switches that the G613 had were flawed and over time led to key chattering (registering a command multiple times with one press). The new switches on the G915 are the new GL tactile low profile switches (a special form of Kalih choc switches in reality), they are much more pleasant to type on and considerably quieter compared to other mechanical keyboards I have tried.

The keyboard seems to be quite sturdy as the base and the entire back are made of aluminum. It has a beautiful design with a brushed finish. On the back, there are 2 stands for adjusting the tilt when placed on a desk. The RGB lighting is very impressive and fully customizable through Logitech's G-hub with 4 levels of brightness. I was pleasantly surprised by the battery life, as with heavy use (10-12 hours a day, with 8 hours purely typing), it easily lasts 3-4 weeks, but at a low lighting level. The wireless connection is extremely stable and very fast, as I have not experienced any disconnections or delays. Additionally, its range is very satisfactory as I have it in the living room, about 5-6 meters away from the PC, using the wireless lightspeed connection, and I have not had any issues.

Now, about the keyboard. On the top left, the "G" that marks the series also changes color according to the selected effect. On the left, there are 5 programmable G-keys for storing shortcuts. On top, there are four M-keys, with M1, M2, and M3 used to expand the G-keys. Essentially, for each M-key, there is a set of five G-keys for storing up to 15 shortcuts in total. The MR-key is used for recording macros. Above and to the right of the M-keys, there are 4 additional buttons. The first and second are for switching between lightspeed and Bluetooth connections, respectively. Overall, the keyboard supports 2 wireless connections (one via the USB dongle and one via Bluetooth) and one higher priority wired connection (as long as the cable is connected). Next, the third button activates game mode, and the fourth adjusts the RGB brightness. In the upper right part of the keyboard, there is another set of four buttons for media control, and just above them, there is a very convenient scroll wheel for adjusting the volume.

Now, onto the negatives. If you spend a lot of time on the keyboard, it may tire you out because it does not have a wrist rest, although its height is very low, and I'm not sure if adding one would make sense. The keyboard lacks indicators for Num Lock (unacceptable) and Scroll Lock, as well as a mute button. The keycaps on top of the switches do not seem very durable, so removing them must be done with special care. When the Bluetooth connection is selected, it could support more than one device, as we see in many other keyboards. Lastly, its hefty price makes it almost prohibitive.

In conclusion, if you are an enthusiastic gamer and at the same time spend a lot of time typing and want to control 2 devices wirelessly for quick switching between them, then perhaps you belong to the category to whom this product is addressed.

I had been searching for a wireless gaming keyboard for a long time that was full-size, clicky, and had good solid construction. The price was quite high and initially concerned me. I decided to take the risk and it ultimately won me over.

The keys on the click model are just right, not too loud but with a good feel. The materials used to make the keyboard are of very good quality. I use it for both gaming and work and it doesn't lag anywhere. It took a little time to get used to because I hadn't changed keyboards in a while, but it's easy to learn!

There are 5 extra buttons on the left side of the keyboard, g1-g5, which you can customize to do whatever you want. There are also the m1-m3 buttons, which are like changing keyboards. Personally, I have set it to m1 for general use and m2 for gaming.

The battery was something I was worried about when purchasing it. But in the end, it doesn't fall short there either. For the usage I do, around 6-10 hours a day with full lighting, the battery easily lasts 7 days with a quick charge.

The volume bar is quite sturdy and useful for controlling your sound without adjusting your speakers.

Overall, it's a keyboard with a very powerful appearance and minimal design. I consider it one of the few wireless gaming click mechanical keyboards that are worth their market value and impress with their appearance.

The only negative I can find after 3 weeks of use is the increased price, but you get what you pay for.

Edit: After almost 2 years, the volume bar is not working properly and is malfunctioning. Aside from that, the keys and battery are just like the first day.

I have had it in my possession for a month now, maybe a little longer. I have the version with the Linear switches. It has already been said how sturdy and generally high-quality it is. It has nothing to envy from the more premium, typing-oriented keyboards on the market and it perfectly combines the "gaming" element, resulting in a perfect all-around performance. "It does it all and it's worth it". :)

It takes some time to get used to it, due to the fact that the key profile is very low (similar to laptop keycaps, with the difference that they are not recessed), compared to a traditional mechanical keyboard with high raised profile keycaps. Once you get used to it, however, typing becomes much smoother and enjoyable, without any issues.

The wireless aspect completes the package. The fact that I can switch from lightspeed wifi to Bluetooth on-the-fly, and type on my phone and laptop, which is on a second monitor, without having to move my...ring finger, is something that I didn't initially take seriously, but it has proven to be much more convenient than I expected. The battery life obviously depends on each person's frequency of use, but with Bluetooth usage for a considerable amount of time, it lasts about 2 weeks. Without Bluetooth and strictly using wifi on the desktop (I'm trying to drain the battery without switching to Bluetooth during this period), I'm at 45% after 2 weeks. Stellar. Mainly typing followed by limited gaming sessions.

As for the linear switches, coming from the tactile switches of the G910, they feel lighter since they lack the bump, the resistance present in tactile/clicky switches, they are completely linear. After 2-3 days, I got used to them and now I can achieve higher typing speeds. If you want to feel and hear the "bump", then clicky switches are more suitable (that's the only difference with tactile switches, the audible click). For uninterrupted, silent typing, go for linear switches. Tactile switches are a middle ground.

The only negative thing I can point out is that the white color of the LEDs is not true white, it seems to have a slight blue tint (this may vary from model to model). Also, at this price point, it doesn't have a type-C connection, although personally, I don't see how it would benefit me. For strictly gaming use, there are much cheaper options that will do the job just fine. In my opinion, this particular keyboard is a tool for long, comfortable typing sessions, with a touch of "GaMiNg". It is definitely worth it for all-around use.