It's a $70 mouse as of this writing. There is a difference... wow there is. This is my daily driver for work.

TLDR: Proper gaming peripheral designers put substantial thought into how the user will use their products and when they do an amazing job you get a mouse like this.

You can read lots of gushing glowing reviews about this product but let me add another perspective to the conversation. For use in an office setting this mouse has been reliable and consistent with its performance. There have been no issues with build quality. No need to worry about a button some coming unset and having to push on just the right spot to get it click back into place. The cloth cord eliminates the dreaded "sticky plastic usb cord" phenomenon that we've all, well most of us at least, have had to contend with.

Also I'm a big fan of being able to adjust the sensitivity of the mouse on the mouse and not in OS. Also I'm a big fan of the light weight but also solid feel in my hand.

Why not wireless?
I switched to a wired mouse for stability reasons. We live in the age of dongles and garbage usb docks and hubs. The manufacturers of these critical pieces of hardware have produced for the most part products that either flat out don't do what they claim to do, do what they claim to do but have stability issues due to poor thermal management, or are too simple in functionality and you don't get that many more ports out of the dongle. I bought this mouse to address the second scenario, thermal performance of my usb dock. The wireless mouse I was using would start to glitch and behave erratically on me as the dock got hotter. Not this mouse.

If you can afford it I wold recommend buying this mouse. Also show some love to your mouse and get a proper mouse pad or gaming mat.

Here's a bit of a dramatic history lesson; if you don't care for it and what the raw details, skip ahead.

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Anybody who grew up when competitive gaming first started booming knew there was only one thing that truly kept it all together: a compelling, new-age, tailor-made passion.

In the mid 2000s, Razer got widespread attention with the releases of their Diamondback and Copperhead mice. They were their first mainstream products, and man did it feel surreal to experience what would be known as the first gaming peripherals. The color lighting in motion, the clicks, the premium feel of something engineered for us few (at the time) gamers was something that I'll always thank Razer for. Logitech was still making exclusively office supply mice, and the closest thing to gaming mouse was the Microsoft Intellimouse 3.0.

They took the first step forward, because they knew that what was about to come was based on a fiery passion that every user reading this review knows by heart: competitive gaming.

Now I'm not going to sit here and say they reigned forever. Logitech, Zowie, and Finalmouse have been IMO dominating the market for competitive mice, and I say that with no regret. I'm a personal advocate of the Zowie ZA series, but I've used all mice from the Sensei/Kinzu to the Deathadder 2013 to the Logitech G Pro. The Razer Viper puts the company finally back where it belongs.

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I won't get into what you can get from their advertising. Let me explain how it actually performs in your hand:

-The shape and weight works in perfect unison together. I personally didn't like the Zowie FK1/2 despite its praise, but I do to this day love the ZA11. I appreciate the contact at the base of my palm as a sort of pivot point, and I have my fingers operate the mouse with a claw grip. This mouse is a dream if you use your mice similarly.

-The mouse wheel is by far the best I've ever used in any mouse. It has absolutely, I mean zero, wobble, it is extremely quiet to the point of being silent, the clicks are subtle yet firm, and the weight is just like the mouse itself: light.

-The clicks, from a feel standpoint, are different. I enjoy the silent switches you find on silent mice, but I can understand those who like the Zowie style which is like a banging click that gives you strong feedback and assurance. They do feel mushy, I am not going to lie, and they will take time getting used to, because pushing them too hard is a thing, and I do have concerns about how long they will last. I am hoping my muscle memory will get adjusted from my Zowie mouse and it will actually turn out for the better. From the limited time I've used it, I do believe that with a softer touch, these will be something that I cannot get away from.

-With the softer touch, I do feel a bit quicker on the clicks. The softer touch required to fully depress them makes your fingers feel a lot more nimble, which is awesome. Less strain, more gain.

-The opposite side buttons are near impossible to accidentally press. I actually like having the option to do with ease so because extra binds are always something I enjoy. But if that's a concern of yours, drop it. For this reason, the hypershift keys are a godsend.

This is my second device from razer
and to say the least I'm not
too happy about receiving a clearly used item.. I mean come on the mouse has scuff marks all over it just like .
If I had wanted to save the extra money I would have bought renewed..
however I did not I had bought it to be brand new.
Now my
Razer Basilisk Ultimate had a similar problem.. + cosmetic damage &
It also had some GROSS gunk on it and obvious use ..
cause I felt I was left in an unfair position I kept it and didn't complain!

I see it's happening again and I'm not sure who's to blame here but it surely isn't me !!
so I'm going to request the replacement and hopefully I'll get a new item as originally intended..
and possibly with an unbroken box so I can store it on my shelf nice and neatly..
Not already ravaged and trashed..

Thanks Razer!.. 2 strikes. 😒

[Item Untested Waiting Replacement]
Got my replacement and everything is as it should be.
Side buttons take a little getting used to..and the middle click is really stiff !!
Almost as good as my Razer Baselisk same shape just significantly lighter;
recommend some grip tape , a mouse bungee & possibly some danker mouse feet / glides
comes good enough to go though for me
personally with low dpi and coming from wireless the cord is still cumbersome enough to warrant
a mouse bungee!

viper ultralight, non mini, non wireless:

it just works really well for my hand. large hands, halfway between claw and palm, i tend to grip the sides of my mouse with my thumb and little finger, and ambidextrous mice make that possible without cramping. logitech g403 had that hump on the right side that made it hard to grip without cramping, and especially since it required so much force to move, which the razer doesn't despite only being 10g lighter (feels like way lighter than that somehow, near-perfect weight btw; not too light it gets pushed around accidentally like the mini, but maybe 5g heavier would be actually perfect)

as a side effect of it being ambidextrous, it doesn't have that slant across the mbuttons like the g403 does, which feels a little unnatural although I've gotten pretty well used to it i guess. i find myself sometimes accidentally pressing the right mbutton if i rest my finger on it, but that's been decreasing in frequency too.

sensor lift off at stock of actually great vs viper mini which for me needed to be reduced using electrical tape. mini was hugely cramp worthy for me, couldn't rest my hand well on it either. way too small

mousewheel flipping is really tactile although maybe a little too hard to spin, not by much though. wheel button is slightly too easy to press while scrolling. no annoying dpi button on top to accidentally press, it's on the bottom face of the mouse.

there are two sets of side buttons, 2 on left and 2 on right. kinda weird, I've disabled the right ones. The side buttons are actually a little hard to press considering how light the mouse is, gets pushed back a little bit, not too bad. very good side grips btw, unlike the mini which had none. feels like they'll never fall apart or anything.

Siempre compré ratones de diferentes marcas y se me dañaban a los pocos meses, pero este mouse lo uso hace más de 4 años y funciona igual que la primera vez.