Very fast and its quality is incredible.

Very sensitive. Very easily defective. Usage sample: 17 mice in total. Only one did not have a problem in 0.5-2 years of use. The classic issue in 70% of cases was the scroll wheel... and in almost all, a WEIRD problem was observed. FPS drop in Fortnite as well as subtle spikes, which were fixed when we switched to another mouse. I do not recommend anyone to buy it unless the company checks and fixes the mentioned issues

The mouse turned out to be problematic. After you connect it, it stops working after a while. Razer's Synapse crashes as soon as it opens. Razer seems to have gone way downhill as a company. Faulty hardware and software that doesn't even work. Also, this is the second time I've ordered from Skroutz and the product turned out to be problematic, 0% success rate Skroutz... nice. The product was returned and I got my money back.

I was looking for a mouse to replace the Razer Lancehead TE that I had for 6 years. I was looking for a mouse with buttons on both sides and ended up with this one. The weight, for someone who wants a sturdy/heavy mouse, is not satisfactory as it has a big difference compared to the Lancehead. In all other aspects, the mouse is perfect

Purchased in December '22 and the scroll wheel started to malfunction 2-3 months ago. Not bad at all..

Other than that, an honest mouse

Honest for the use I wanted it for, after 4 months of use it has not shown any problems like other Razer models with the scroll wheel despite its rough handling.

I have had the mouse for about 2 years, as a left-handed person it has been convenient for me to finally find a straight mouse that has buttons on the right side. It may not be as convenient for right-handed people since most of them are already used to "curved" mice. For me, however, it has been a great help. After two years, the area where I press the side buttons has worn out a bit, which is of course completely reasonable after so much use.

The mouse is very okay, but it is for ambidextrous users, which I thought would not be a problem, but for me personally, being right-handed, there is a corner that pushes the bone away from the mouse, which bothers me. It is not very comfortable as a mouse for gaming.

Very good grip and a very nice feel overall as long as it works properly, but the washer has broken on all 3 that I have bought, sometimes earlier (3 months), sometimes later (1 year).. Generally, there seems to be a manufacturing issue with the washer from what I have seen, so it hasn't happened to me.

I have had this mouse for over 2 years. It is a lightweight and beautiful mouse, but the clicking sensation was a bit strange from what I remember, and the scroll wheel was very tight. However, the reason I am here after so long is because it started giving me scrolling issues 3 weeks ago. I scroll forward... it goes backward, I scroll backward... it goes forward and so on. From what it seems from the other comments I have seen, I am lucky that it started having this issue now. It's a shame for the mouse.

Very good mouse, at a very good price. The only thing that bothered me is that a little before it turned 2 years old, the scroll wheel started to malfunction (I don't take care of it at all and it has generally endured a lot of abuse, so that might be the reason for the scroll wheel issue)

You don't understand the mouse at all, despite the fact that it is wireless. It's a bit unfortunate that you can't take advantage of the 8khz since it can lower the fps, but it's fine if you want to get one of the top mice without having to spend 150 and 160 euros.

Owner of the previous generation viper with the 3390 sensor and the black mouse skates. This mouse is a refurbished version of the 2019 viper with an upgraded sensor, 8k polling, and 100% PTFE feet (white mouse skates). It is worth the money and more, in my opinion, I consider it one of the best choices for a wired mouse at the moment (although I prefer the endgame xm1r due to its shape as I prefer the claw grip). Of course, there are not many games yet that take advantage of the 8k polling, so as far as gaming is concerned, it is simply a cool feature they added, just to have it. (I want to mention that the higher the polling rate, the more information the computer receives from the mouse, so there is a possibility that it may negatively affect performance, although to a relatively small extent)

Very good left-handed mouse but it died during usage.
I will send it for repair through warranty to zegetron to see what they will tell me.

Looking for a left-handed mouse, I chose this particular product.
The best choice for the money.
One of the main reasons I chose it is the software it has with macro loop.
update#
After four months of use, approximately 160 hours, one of the side buttons broke.

Very few games support the 8khz or even the 2khz option. Check if the game you are interested in supports this option, otherwise buy the regular viper. As a left-handed person, it has been extremely convenient for me and its ergonomics are very good. Be careful, as most mice have issues with the scroll, just like mine does over time. If it is an imported product, the Greek representative does not cover the service.

I haven't tested the 8Khz to give an opinion on it. However, it performs well in other aspects:

+ The well-known good grip of Razer (palm/grip), even for small hands.
+ Useful ability to adjust the minimum tracking distance.
+ 5 On-board profiles (but first you need to create them from Razer's software).
- I would prefer the side buttons to be slightly larger.
- The clicks are a bit noisier than desired.

It promises 70 million clicks. The first Razer Deathadder I had never lasted more than 2-3 years. I hope this one lasts at least 2-3 years longer, as it promises.

I have had the mouse for 8 months since 22/3/21. I'm not a Razer fan, but I said let's try the mouse, I bought it and I was honestly amazed because it fit incredibly well in my hand compared to any other mouse. The problem is that it disappointed me today because after exactly 8 months, the scroll wheel click requires more force to activate and sometimes I press it and it doesn't work because it requires more force. For me, this is a downside since I find this button on the scroll wheel convenient. Additionally, the scroll wheel behaves strangely in games when trying to switch weapons, it doesn't change immediately, it requires a second attempt. Personally, I consider this unacceptable, especially when I bought it for the price of 78 euros and within less than a year, I have a problem with the scroll wheel. Even if they fix it, it should last for at least 2 years. 78 euros is not a small amount for a simple mouse

The best value for money from Razer. I bought it solely because I am left-handed, so I have no opinion on anything else for right-handed people. For symmetrical ones, I believe it is the best in terms of build quality and overall response in the 50-70€ range. It has a weighty feel for plastic and is quite large in the hand if you're not 2 meters tall. You can barely use it for business purposes and change the mouse after about 10 years if you have a budget for terminals

Truly the best mouse I have purchased, I have had it for a year+ and I am very satisfied. It is worth its price and more, I highly recommend it without hesitation

It is an excellent mouse. Similar to the previous Viper models in shape and weight. The deal breaker in my opinion is that the 8k Hz greatly affects CPU utilization. I would recommend going for one of the previous models in the series since there is not a noticeable difference in gaming between 8k Hz and 144 or 240 Hz, although there is a difference at 360 Hz, which I doubt many monitors have