To start off, this mouse has the most up to date internals on the market and optical switches that are nice and tactile and not too hard to click. The mouse shape is more of a flat shape and I would recommend it for people who use a hybrid claw and finger tip grip combination or just a fingertip grip.
This mouse also has a light weight at 58 grams, comes with grip tape included but I prefer not too use them. It's build structure is as solid as a brick and there isn't much too say; I hear a lot of bad things about Razer products and I haven't experienced them before. All in all this is a good mouse as long as it feels comfortable to you because shape will always be king.

It feels great on hand, one of the lightest I ever used. Unfortunately, the SW doesn't work well on MAC.......take that into consideration if you are buying it for MAC.

Haven't used enough different mice to rate it for anything specific. I wanted a wireless mouse to use with my split keyboard and realized I probably wanted something light weight because lots of mouse work (gaming) can hurt my hand/wrist. Lighter weight helps.

I'm totally being ridiculous and knocking off a * because there's not much to its looks. Never mind adding leds or something would make it heavier. I wish it was prettier!

I've had no problems after using it daily for months. And since I've had it go dead *once* when I wanted to use it, I think the battery life must be pretty good.

Software is kinda annoying. The charge cable is nice though! It's soft/pliable so easier to move out of your way.

Not a huge gamer but I'm sort of picky with my mouse feel and size. I tried a few different mice and my previous main mouse was the Glorious Model D, both wired and wireless. It's been a great mouse but I found the wireless version battery doesn't last more than a day and it's been "wired" almost full time. Started to be frustrated with all of the cables on my desk and tried to find another wireless that fit my hand but also wasn't super heavy, low latency and had good battery life.

From the reviews, the top gaming mouse was the Logitech G Pro X, very expensive but I wanted the lowest latency possible. While the performance of the Pro X was great, the body feel was very cheap and almost like a plastic Easter Eggshell. The body also felt too slick and combined with the extreme lightweight just didn't vibe with me.

For work I have a Razer v1 Viper wired, it's good but the buttons feel slightly mushy, so I didn't check Razer for a gaming replacement at first. Later I ended up buying a Razer v1 Viper wireless, and looks like they fixed the buttons, they were very snappy and the latency of the wireless was almost the same as the wired. After such a positive experience, I was going to buy another v1 but with the news of the v2 coming out I held out.

From the first out-of-the-box experience with the v2 Viper, I first noticed they removed the dock and there's no longer any quick charge ability. Honesly, this isn't a big deal, if you need to charge the mouse, just plug it in, and use it. With the dock, it's sitting on the stand, taking up space. The mouse is now USB-C which is nice, comes with the same very flexible cable, and the wireless dongle has a nice extender where you can have sitting as close to the mouse as possible (reduces latency).

What's the biggest change on the mouse? It's very noticeable of the weight reduction, it's about 12g of difference, but at 58g, it still feels very solid (much better over the Pro X). The body of the mouse is the same as the other Vipers, it's slightly rough but doesn't feel cheap, fitment is great in my medium hand. It is worth noting Razer had to remove a few features of the v1 Viper in order to reduce weight.

One thing is it's a solid black mouse, I love the new look. The only indication of any LED's is a very small dot right below the mouse wheel, this indicates the battery charge. There's no other LED's on the mouse so keep that in mind if you're looking for matching the keyboard. Another change is the removable of the right side "thumb buttons". The v1 Viper allows for right and left-handed use, but the v2 Viper only has the buttons on the left side (for the right handed user). A nice bonus is the included grips (four pieces, two side stickers, two for the buttons), these are very grippy type of rubber.

While I haven't owned the v2 Viper wireless long, it has great latency on the wireless side and with the light weight doesn't feel any more than my wired mice. The pricing is a bit steep but it's on par with other high end gaming mice, I would choose this over the other brands based on the Razer fits my hand the best and has the best click feel.

Downsides? The biggest issue is the auto-installer for the Razer software. I'm sure the software is not too bad but having the prompt every time is frustrating. I often use a Razer mouse for my work laptop and given the security issues, prefer to not see this app auto-execute.

Would have given this product a 5 out of ten if I had found the shape comfortable. It is very flat and narrow which makes it feel like a very small mouse. Every other thing about the mouse is great such as the clicks, build quality, sensor and sensor latency. Since I liked every thing about the mouse besides the shape, I bought its big brother, the Deathadder V3 pro which has the same specs but a bigger shape. I recommend not getting the viper if you have larger hands and not to get the deathadder if you have smaller hands