I actually used an Alphagrip daily at work for probably a year+. It halved my normal qwerty speed (120 wpm down to 60 wpm), but got rid of all of my wrist pain. Good exchange! I had a similar experience that I bought my first one ten years ago, then sold it after a few years of not using it. On a whim after I started feeling pain, I tried again and after doing typing tests for 10-15 minutes each morning for a month it finally stuck. Ended up modding it with a teflon trackball before I finally unplugged my normal keyboard and put it behind my monitor.

Would be nice to see an upgrade with a working shift key (the modifier is not actually sent) and a wireless option...