I personally have never heard anything out this keyboard. But the idea sounds kind of appealing to me, I have really bad wrists, and typing reeeeally doesn't help, and if you don't actually have to physically push on a button, it would really help myself and all those others who suffer from carpel tunnel.
I just turned 17 and my wrists are in terrible condition from constant use of computers and breakdancing. So I think I will definately do some more research on this product.