It is by far the best mouse I have ever used in terms of accuracy, responsiveness, grip, convenience, and of course, it is beautiful. Unfortunately, it has a serious issue regarding durability, specifically with its side parts.

A few months after purchasing it, the "pads" on the side started coming off. At first, some glue would come off from the edges, and then they started shifting when touched, eventually coming off completely after a while.

I did some research and found out that it is a known issue, and Steelseries offers free replacements. After contacting the company and providing them with the requested information about the mouse, they gave me a code for their website for free shipping and a free replacement kit. Taking advantage of the free shipping, I also ordered 2 additional replacement kits at my own expense.

Afterwards, I was more cautious in its usage and they lasted longer, but they still broke. Currently, I have had the mouse for 3 years and the last replacement kits I had taken (a total of 4 sets) are about to break as well.

Additionally, now the scroll wheel has started having issues. Sometimes it scrolls in the opposite direction of where I want it to go, or it scrolls up and down on its own without me doing anything, or when I click the middle button, it opens the wrong things. I will try opening it up and cleaning it, but I might need to get another mouse...

It is really a shame that it has these problems because otherwise, it is an amazing mouse, but unfortunately, I cannot recommend it. Maybe it is worth trying another Steelseries mouse, as they seem to have good sensors, but I don't know if I can recommend it after the issues I encountered with the scroll wheel.

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While the mouse is good, the side buttons and the large size make it uncomfortable and not good for me. The sensor is flawless, the right and left click are okay, but not as fast as I want them to be, and the scroll wheel, the best I have encountered in a mouse. It also has excellent software and in terms of appearance, it is beautiful. Now let's move on to its two problems. 1) It is impossible to reach the side buttons, especially the last one. So, its function is basically useless. 2) One end came loose, but I fixed it. However, for a 70 euro mouse, this is not right. Of course, I knew about this problem before I bought it, but I mention it again to confirm it. So, because I couldn't stand not being able to use the last side button (I have it for pistol), I disconnected it and put my old mouse back.
CONCLUSION: If you have veryyyyy long hands and glue to stick the end, it will be a perfect mouse for you. That's why I gave it a 3 and not a 1.
The company, however, is good. Having the SteelSeries Arctis 3 headset, I am completely satisfied.

I have had the mouse for about a year and I want to share my mediocre to bad experience.

The mouse does not have any technical issues, the buttons work correctly, the cursor moves accurately, and the software is satisfactory. These are all important, but here we go.

-The mouse is not comfortable to hold, especially if you want to regularly use the side buttons. For those who play MMOs, it is preferable to assign spam keybinds to the keyboard and cooldowns to the mouse.
-The placement of the buttons pushes you into a very uncomfortable grip. Personally, the only way for the mouse to be comfortable for me is to use the front button. Maybe it's a matter of habit, but when I use the other buttons, my hand gets tired and the curve of the mouse is not suitable for my hand, resulting in pain in my palm. The mouse may seem large, but it is not designed for very large hands.
-The rubber grips have come off, which is truly unacceptable for such an expensive mouse. In Greece, there is a service available, but they ask you to send the mouse to the store and then they will send it to a representative, and with the current situation with the postal service, good luck. Good luck also in getting your mouse back without any technical issues and not a refurbished one. All of this could have been avoided if they simply sent replacement side panels (which they sell for 10 euros on the official site, but with shipping it costs an additional 15 euros, unfortunately I couldn't find them in Greece). Photos are not enough for them, they want to examine it in person to see who knows what... for a KNOWN issue. The official site will not assist you if you did not purchase the mouse from there.

Look for another mouse in my opinion, because it's not worth going through the whole process.

Finally, for those who have the mouse or want to buy it because they found it at a good price, even if the side panels come off, there are solutions. One solution is to buy side panels from the official page (although no one knows if they will come off again). Another solution is to remove the adhesive that they used for glue, clean it well with a cleaner or alcohol, and then stick it back on with some glue (I used silicone glue and everything has been fine since July). The rubber does not fit perfectly in the place it should be, so first see how it fits your grip and make sure it adheres well and obviously does not get stuck on the mousepad. Another solution is to get rubber grips from AliExpress, which are adhesive and made by 3M (which I have not tried, but read the comments on the site). If you have issues with the glides, go back to a Chinese solution.

It was purchased exactly when it was released, that is, in early 2018. It has been used daily and for many hours of operation. Its positives are, in my opinion, its amazing keystrokes, satisfying texture, good scroll wheel, proper weight/size (it also has weights, my hand is large, I mention it relative to the size of the mouse), responsiveness/sensor, and additionally, its RGB is fantastic. Its negatives are mainly found in the quality of the side thumb buttons, which do not correspond in any way to the quality of the main buttons. Additionally, the side cushions on the right and left, intended for the thumb and middle/little finger, started to come off after a short period of time, but not to the point where they are particularly bothersome or ready to fall off. Nevertheless, I find it somewhat unacceptable that they did not find the right glue/material, etc. to avoid such a thing. Ultimately, despite its negatives, after about 2 years of continuous use, I can say that it was worth its money (purchased for 90 euros), due to its durability, which I observe with the exception of the aforementioned cushions, as well as the quality of its sensor and its overall construction. There is a possibility that the problem existed because it was from one of the first batches that often face issues, but I believe it is worth giving it a chance.

First of all, disclaimer that I got the mouse for 62.5 euros, which made the purchase more attractive. If it's more than 80 euros, I would recommend avoiding it. There are cheaper alternatives.
I use the SteelSeries QcK+ Limited mousepad.

So, we have:
• The innovative lift-off sensor, which compensates for the "deviation" that occurs when lifting and repositioning the mouse on the mousepad (something that often happens in games). For very competitive players, it's an extra advantage that might give you an edge. Otherwise, it's generally a nice luxury.
• Ergonomic shape, which is not particularly impressive, as most mice in its category have achieved it perfectly for the past 3-4 years, maybe even more. Something I noticed, to be nitpicky, is that the silicone coating on the sides, while very high-quality, slides ever so slightly. I noticed this when my grip on the mouse slipped while lifting it from the mousepad, meaning outside of gaming, while making gentle movements in Photoshop, for example.
• Latest generation sensor. Yes, I know we've heard this fairytale before. However, SteelSeries claims that it is a truly 1:1 sensor - meaning it can be adjusted so that the distance you move the mouse on the mousepad is the same distance the cursor moves on the screen. I don't know what magical complexities are involved in this, and I'm not a competitive gamer, so let's assume it's an advantage of the product. ;)
• For medium to large hands. Claw grip is probably difficult with medium or small hands.
• It comes with eight 4g weights each for weight adjustment (4 weight slots on the left and 4 on the right).
• Without the weights, it weighs 96g, with the weights it weighs 128g - so it's quite heavy. I would say the additional weights are more for balance: to be honest, I found myself adding two weights on the right - I noticed that for some reason, I tend to lean the mouse to the left when lifting it, and I can say that I felt the difference in comfort.
• Satisfying scroll wheel, the click of the main buttons is somewhat hard, but also enjoyable.

That's it from me. Just pay attention to the price. At around 60 euros, it's a good buy. Anything over 75 euros, I wouldn't go crazy. Cheers.

I received the mouse today, with the few hours of usage I have had with it, I have formed a first impression.

On the positive side, I have to say that I found it for 62 euros, so without a second thought, I bought it. It has a detachable cable (it is not wireless), its side parts have magnets and can be easily removed with a little pull, and from there you can put the weights that steelseries provides, a total of 32g extra. Personally, I added 4g + 4g on the left and right, and the feeling is incredible. It is quite sturdy and it suits me well for gaming. The 3 buttons on the thumb side are convenient. The only thing I didn't like compared to my previous mouse is that the click is quite noticeable. I would prefer it to be a bit quieter and more comfortable to press, but I will probably get used to it over time. The software is easy to use, it didn't take me more than 5 minutes to download and adjust colors and DPI as I wanted. It has plenty of options for its RGB lighting.

Temporarily, I don't have any negatives. I will use it for a little longer and I will come back with updates.

Edit: I was a bit late... last summer, due to the heat, the plastic parts on the sides came off. I did some research and found out that many people have experienced this issue. It is an excellent mouse, but the material used for the plastic is very poor. I found a way to fix it with plastic glue, but it's not a major issue for me at the moment. I believe as the temperature rises, they will come off more frequently.

25/09/2020

Edit2: I have started to get extremely annoyed... all the parts have come off to the point where I want to throw it away, as you can see in the photo. This is happening to all the surrounding plastic parts. It is sturdy and nice, but the material is terrible. Do not invest in this!

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