I got the Microsoft Natural Ergo 4000(did they start with 1?). I bought that after my wrists started hurting from being bent on a regular keyboard. It takes ab

I got the Microsoft Natural Ergo 4000(did they start with 1?). I bought that after my wrists started hurting from being bent on a regular keyboard. It takes about a day to get used to it and about 3 for your fingers to get used to the new key placement. But overall, its very comfortable.