I bought my first copy of this keyboard when my wrists started hurting about 5 years ago. It was the only keyboard in the store where my wrists didn't hurt just looking at the thing.

(I solved my wrist problem by going to the physical therapist - they recommended stretches for my particular injury. I also took the arms off my office chair, as my particular injury was caused by resting my elbows too long on the armrest. AND I switched to the MS 4000 AND I switched to Dvorak.)

I _thought_ the trick to many ergo keyboards was the split keyboard, so you can keep your wrists parallel to your forearms instead of having to bend your wrists out to get your fingers parallel to each other. But not sure how much of that is fact and how much of it is folklore.