The cable became stripped within 1 year both on the mouse side and the USB side. Otherwise, it's good.

The most comfortable mouse I've ever had, at least for my hands.
And I've tried the DeathAdder, the Viper, and other well-known mice on the market.
I give it 4 stars because after 6-7 years of service, it started double-clicking.

Logitech could release an updated version and it would be one of the best mice on the market. The main problem is obviously the scroll wheel that has issues. Beyond that, the rubber on the side deteriorates after a few years. Without the weights, it weighs about 85 grams.

Very good mouse - reminds me of Logitech MX518. The only negative I can think of is this rubberized cover it has which I don't know how many years it will last but okay. Since I see many having the issue with the wheel, I had the same problem and found the following firmware update from Logitech on youtube/reddit which for some reason does not appear on their site. If you haven't solved the issue with the wheel, it's worth trying. https://support.logi.com/hc/en-us/articles/360025283833-G403-Firmware-Update

Very nice and convenient, but after two or three years the wheel breaks, so what can you do with it, without any crazy usage. IT BECOMES INFINITE SCROLLING LIKE YOU HAVE THE G502

The mouse, after 2 years of use, stopped working the scroll wheel, which is a common phenomenon in Logitech mice. The RGB is quite beautiful and it is good for large hands.

Amazing mouse and good grip, but after 2 years it broke for me too, the scroll wheel, without intense use.

The English say "simplicity is genius". If you want a Mouse that is as close to the perfect extension of your hand as possible. It has rubber on the sides and combined with its low weight and shape makes it very easy to handle, which is what you want. The weighting is flawless. If you want lots of buttons and a wheel that locks and runs, go elsewhere... The buttons make moderate noise while the wheel is silent and with a very nice feel. As for the issue they say with the wheel, I do not know if it will present in the future... for now it is flawless.

------update-------------------
After a year, the wheel started double-clicking. For now, it is tolerable but I believe the problem will worsen as I read from other reports. Also, the cable that connects to the mouse has been stripped from the beginning... while it is a comfortable mouse, its build quality is compromised... 3 stars now...

Very good, very convenient especially for claw grip! The only negative is an issue with the scroll wheel, like in all mice of this price range. It doesn't require much force on the scroll wheel because it does its own thing afterwards. I bought it a second time because of its convenience after the scroll wheel broke on the first one. The scroll wheel has been working perfectly for about 6 months now!

Very light and worth it for counter strike, but the wheel broke for me too, as well as for many others as I read in the comments.....

Just received....
positives:
1) The wheel is soft, but a bit hard to press.. it might soften over time.
2) The keys have normal noise.
3) It has a nice matte texture and good grip... it has very good material quality!

negatives:
1) Don't be confused by the photo they have put..... IT IS NOT FABRIC CABLE!!!!! it is a simple cable which is QUITE THIN!
2) It is a bit heavier than I expected, the previous one from gigabyte was lighter.. (this is my personal opinion).. note that I haven't added the extra weight of 10gr that it has inside.
3) The side buttons are a bit large in size, resulting in the back function button being quite far back and making it difficult for the thumb to press it.

for 55€, no, it's not worth it... when it drops to 35-40 then yes.

I hope I helped.

No words needed, it is a very good choice for surgical movements, light, and the click is completely light, not for people who prefer quite large mice or people who want to hit the click with all their passion.
(exclusively for right-handed, if someone wants ambidextrous, they go for G Pro)

The best mouse I've ever had out of all the ones I've tried, the only flaw I give it 4 stars for is the scroll wheel which makes noise and I discovered on a forum that they have issues. Very durable in use.

The mouse is one of the best for gaming on the market right now, both in terms of price and quality. It is very durable and precise. I have had it for 3 years. The feet have not worn out at all (I use a CORSAIR mousepad). It's worth it!! :)

The mouse is one of the best for gaming on the market right now, both in terms of price and quality. It features the HERO sensor, which is Logitech's best with full precision and low ms, of course. It has adjustable weight of 10gr. Logitech's software is incredibly good. I recommend it to those who don't want to spend a lot of money on a more expensive one and are on a low budget.

The G403 Prodigy was replaced with the G403 Hero fortunately within the warranty due to the classic scroll wheel issue, and I received the G403 with the new Hero 25K sensor (25,600 DPI). The only difference from the old one, besides the sensor which I didn't notice a difference in, is that the new one doesn't have a braided cable, which is actually good since the mouse movement is not affected by the cable. Many people had complaints about the braided cable, and Logitech fixed it in the new model. I consider it quite good for FPS games, at least it has worked well for me! I hope it is better in terms of quality and doesn't have the issues of the old one (middle click and scroll wheel).

Amazing gaming mouse. Suitable for large hands. Very durable and precise. I've had it for a year.

Edit. The scroll broke after a year

After 3 years of ownership, I believe I can express an opinion.

Usage: browsing, FPS gaming, moba gaming

Excellent, I have no complaints. The cable is durable. The feet have not worn out at all (I use a steelseiries mousepad)!

The grip is "loose", if you are one of those who squeeze and hold their mouse, it may not be for you.

10/10 mouse.

Visually, it is not impressive, I would rather say it is more understated and goes unnoticed.

I don't know why it has so few reviews compared to the g403 prodigy, but what I have to say is that the mouse is flawless and in relation to the prodigy, not only is it newer but it also has a better sensor

Impressive mouse with a powerful feature of adjusting the weight by 10 grams. The side grips and its shape provide a good overall grip, making it enjoyable for those who prefer medium to large mice.
Greek video unboxing: https://www.youtube.com/watch?v=MEN2gdR6ivM

Very good mouse. Although it is the 1st "proper" gaming mouse I bought, I have had it in my possession for 2 years now and I can say that it has never disappointed me in terms of sensor accuracy. What the others mention about the scroll wheel, I have also noticed, but by pressing the scroll wheel (i.e. the click), it sometimes gets fixed. I probably got lucky and it's not so defective...
The only complaint I have is with the material on the sides of the mouse, which is rubberized plastic (1mm thickness and underneath is regular plastic), and over time it deteriorates and starts to stick. I had to get a knife and start removing this rubber because it had started sticking excessively. It's not the most beautiful thing anymore, but it still does its job without sticking to my hand after use.

It would be the best mouse if the scroll wheel didn't break in a year and a half. The mouse is perfect, it has the perfect size, it is ergonomic, it has a nice feel when pressing all the buttons, the buttons have a very good size, but it has the huge problem that the scroll wheel starts scrolling backwards from the direction you move it, and at first it starts 1/20 backwards and reaches the point of being 18/20 backwards, but the problem is that once you have lost 20% of trust, you can no longer use it, and it's for throwing away.

Big mouse for big hands, sturdy, with rubberized sides and a nice matte coating on top. Although the internet doesn't speak well of the sensor, I didn't find any issues when I tested it on Kovaak.