I can't recommend this keyboard highly enough. The split keyboard is the most comfortable one I've used and is as it follows exactly the natural angle you hold your wrists at. I believe the split keyboard is, for touch-typers, far superior to the ones that are merely curved. For me, curved keyboards don't go far enough and still force my wrist into a slightly unnatural 'straight' position, hence I assume are aimed at people who can't actually touch-type. If you can't touch-type, I don't think this is the keyboard for you. The negative tilt and the large curved wrist rest were the reasons I chose this keyboard in particular - it's the most natural position to hold your hands in and type. Most keyboards have feet at the back to tilt the keyboard at you and whilst this seems to be accepted as the norm, it's probably the worst thing you can subject your wrists to as you have to angle your hands upwards to type. The negative tilt on this keyboard fully supports your hands and wrists in the most comfortable typing position. I'm not sure whether Microsoft have improved the keys on newer models because I don't have any problems with 'hammer' keys or keys that don't push down properly that other users have mentioned. The T, H, G and N keys are wider than the other keys and the space bar is huge, so whereas on previous models I've 'missed' hitting a key because it wasn't large enough, Microsoft have now rectified this problem. This is the most comfortable keyboard I've ever used and I can now type for hours without the wrist pain I've experienced on standard flat keyboards. In fact find this keyboard so good that I'm buying one for home use too!