Ergonomic Design for Wrist Comfort – The VMDMW Vertical Mouse 4 gently supports your hand in an upright neutral position, reducing strain and alleviating wrist discomfort. Perfect for those seeking an ergonomic mouse for carpal tunnel issues.
This vertical mouse is more vertical than most other products out there, such as the Logitech Vertical MX.
I like a larger size than my hand measurements would indicate, because I like to relax my hand and have it well supported. It does take a few days to get used to using it, but it's worth it.
The multiple buttons are great. I've got one to close a window (which in Chrome has an app-specific setting to close a tab instead). You can set up the number 6 button (at the bottom of the thumb) to be like a shift key for the other buttons, supporting a second set of functions.
(Amazon just called me a potty mouth. Sorry.)
I know the mouse seems a bit to shiny and slippery at first blush, but it actually isn't a problem for me, keeping it in my hand. I'm happy this version doesn't have the spray on rubberized finish, because a search of eBay for used ones shows that that finish will deteriorate and peel off, and because I have touch allergies to similar kinds of rubber coatings.
I like the little dips for the fingertips on this model very much. Helps to feel oriented on the mouse, especially for beginners. I have occasional trouble with tracking, but it doesn't last, and I suspect that's only when my computer is a bit overloaded doing other tasks.