CSL-Computer Vertical ergonomic optical USB mouse/vertical model | ergonomic design - prevention against mouse arm/tennis arm (RSI syndrome) - particularly arm-friendly | 5 buttons

Purchased as a replacement for another vertical mouse which went through batteries like a kid in a candy store goes through, candy! The design of this fits the hand perfectly and keeps the wrist in a more relaxed and natural position. I have two paralysed fingers so find it almost impossible to use a flat mouse. With this design it’s much easier and more comfortable. It tracks smoothly across the mouse pad and the wire tucks neatly out of the way across the top of my keyboard. Both my son and I have used this style for years and are very happy with how it moves and functions. So far there’s been no annoying squeaking or other noises. Bottom line - I would purchase again. Great little mouse

I have used many different mouses over last 20 years, at work and privately. There were some good, bad and average. My last and previous one was the worst. Single clicks were sticky making it double, very annoying and I truly hated it. One day I noticed vertical mouse on a desk. Its user was very happy with it, so I thought I will give it a go. Did some search online and found CSL's one. Price was acceptable, not too cheap and not too expensive, if it was rubbish, I would cry. When it arrived, I unpacked it and began using it. My God, what a thing! It is so easy to use, precise and extremely comfortable. It fits a hand perfectly and I can't stop holding it! It has three extra buttons, two for moving pages forth and back and the third one but ... don't know what it does yet :) Scroll is very good with option to press it, which allows to move a page with sliders up, down and sideways without pressing or holding any button. Very useful, especially in Excel. It also has a lovely blue light on its left side :) Honestly, I'm not exaggerating, IT IS THE BEST mouse I have ever used. I'm loving it and recommend it to everyone. I bet most people will never use anything else once tried this one. But of course, some may not like it, as is with everything else. It works for me beautifully, so it may for you to :)

Picked up for heavy continuous gaming and office work on a static desktop station. Material is grippy, mouse is not too heavy. The M1 & 2 buttons work well with both a slack and closed grip. There is plenty of room to be adjusting your hold on the thing. This is an ergonomic vertical mouse so of course it is tilted, and enough to reduce torsion of your forearm and keep the flat of your wrist from being compressed. Combine it with a wrist supporting mouse mat and you have a very comfortable set up for prolonged use. Minor cons involved the mousewheel click (slightly awkward but is easing with repetition) and the additional buttons on the thumb side, one of which I press accidentally sometimes. Other than that I have no complaints. This seems like a very good mouse, especially for the price. I have only had it for a week though. If you have no intention of spending a large amount on a vertical mouse but like the idea then this is worth a go.

Fantastic mouse. Tried a bloke's at work and just had to get one for both work and home. Nice, rubbery grip, good layout for the hand, glides well over a mat, and SO much better on the wrist! I normally HATE ergonomic equipment (keyboards, the big "block" type mice etc), but this one is fantastic! The hand & wrist is in a much better and natural position when on it's side. Not fantastic for gaming though where extreme / quick precision is needed, but I've kept my old, regular mouse plugged in for that. It's fine for slower games though, and it feels so weird going back to a standard mouse! Completely cured my wrist ache I used to get when using a mouse too long.

I've had RSI for years, and have already got through two versions of another vertical mouse from a specialist supplier in Holland. I was about to order a third, but as I was ordering a new keyboard on Amazon this one caught my eye - and I'm glad it did. It is a really comfortable little mouse, neater and less cumbersome than my previous model and immediately felt better in my hand. It is also incredibly reasonably priced compared to similar vertical models, coming in at about 1/3 of what I paid the last two times - and even that was on the inexpensive side compared to some I've looked at. If you suffer at all with numbness or pain as a result of mouse use do treat yourself to one. I couldn't continue to work without it. A vertical mouse makes a huge difference, it really does, and so far I am delighted with this one,