[Black] I use this mouse for work. i do some web design and other types of developing. pros - my arm posture using the mouse just feels more natural. I have a small gel wrist pad as well and together my arm is always comfortable. I rarely get any pain anymore from using a mouse.Also, the wireless functionality is great (Win 7 64 bit). No issues with connectivity or with the laptop recognizing my movements.Cons - Really, it was hard for me to finally decide to spend $ for a mouse. Thats money that could have been used elsewhere. However, I'd rather spend that money now on a mouse to save me some pain then spending more money down the road on surgery or physical therapy to help correct something else.

[0.015 lb] I use the Evoluent for my main computer. It is a large mouse and it does take some getting use to. It has three main buttons under the fingers, two buttons next to the thumb and the wheel button. All are programable with the downloadable software from the Evoluent site. The buttons are a little light but once you get used to them it works very well. I liked it so much I purchased one for my wife. Both are on computers that run Win 7 pro, no problems yet. I have been using the mice for 3 weeks.

[Black] Precisely effective for engineering CAD drawings. Customizable buttons are very useful for repetitive task that sometimes involves pressing buttons using more than one finger and programming it with just one click. I can only use my left hand because of injury on my right hand so this is a big deal for me.

[0.015 lb] i started using this mouse at work since they first came out. I think it was around 2007 because my wrist was giving me trouble. I bought this one for home. I highly recommend them for anyone who does a lot of computer work. Being able to program the buttons is wonderful. My wrist and arm have never suffered since using this mouse.

[Black] It may not be for everyone but it serves my purposes great. After using an Apple Magic Mouse for many years, not ergonomic by any means, it became all too clear I need something that was much easier on the hands and wrist. This certainly fits that bill. And having been spoiled by the functionality of the Magic Mouse I was looking for something that I could program. This meets that and more. The options are limitless. You just need to figure out what you do the most of and program those. In all I have 9 different functions programmed into the mouse. A great mouse if you are looking for ergonomics and functionality.

[0.015 lb] Totally different than a traditional mouse but by Day 3 using it I am really loving it. I have days where I spend 12 hours at a computer and was having repetitive stress pains in my index finger from clicking the mouse button. After only two days using this my finger already feels better. Well worth the price, the device is extremely well engineered and works so smooth. I can't believe how many years I used the $$mouse that comes with a computer.

[0.015 lb] This will be my best buy in electronics accessories for years! Comfort is is much larger than I thought. Now, one that I want a fully ergonomic keyboard, because the difference is very positive.

[0.015 lb] This device allows you to mouse with your hand and wrist to be in a more natural position. You don't have to twist your arm over to cover a flat mouse and is much more egronomical. I've been using them for years and when one wears out I go out and buy another.

[0.015 lb] It was easy to set up and is very comfortable to use. The buttons click easily with little effort and it doesn't require much movement to move the cursor across the scene.

[Black] easier on the fingers and arm.