I tried those for a while when I was on my last ergo kick. The ball was just too hard to move for me. I almost had to pinch the thing to make it slide. Inste

I tried those for a while when I was on my last ergo kick. The ball was just too hard to move for me. I almost had to pinch the thing to make it slide. Instead, I've found this more comfortable: http://www.evoluent.com/vmouse2.html http://www.evoluent.com/vmouse2.html Works great with a gel wrist wrest on the mousepad.