Evoluent USB Wired Right-Handed VerticalMouse 4 is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by drwhite from Best mouse on market1. Comfort: No carpal tunnel aches and pains with this mouse.2. Use: Natural hand position makes use very easy. Same button operation as regular mouse, right click/left click.3. Options: Complete customizable, make the buttons (5 of them)do what you want them to do. Quickly change between different applications.4. I am buying my second one after just over two years of use. The wheel axis is not seated anymore, it wiggles. But that is not enough to stop me from wanting another one.