I have be use computer for 12 year and continue to do so with AT LEAST 7 hour of `` keyboard '' time . I have use countless keyboard and have to admit I be not too fond of Microsoft product . however , this keyboard simply work as it intend to . the engineer at Microsoft put some great thought into this keyboard in term of the shape and natural positioning of the hand . about six month ago I have sharp pain on my wrist and my doctor actually prescribe I specifically to use this keyboard along with a optical mouse as she have good result with she prior patient . she be dead on right . I have be use it for six month and the pain be now go . it take I about a day or so to adjust to the split format . the split layout promote proper typing and the reason why it take I so long be because I type some key with my right hand , when I be suppose to do it with my left hand . no big deal . this be the only keyboard I be use , home and office . it be about time Microsoft get something right ...