I have the sculpt as well, and I think it's horrible. It drops keys all the time, especially the first one I type, it's got very little tactile input so you have to press the keys harder than you'd expect, and the Fkeys are terrible. They put F1-F6 on the left side of the split, so the most common Fkey isn't on the edge where you'd expect (and where it is on the MS Natural Ergo), and it's very easy for the Fkeys to catch on the bezel and stay depressed until you wiggle them. They arent' the same kinds of keys as the rest of the keyboard either... some cheaper version that doesn't have any tactile indication of when a key is actually pressed. You just mash on this soft tiny thing and hope it doesn't stick.
Worst keyboard I've ever had, hands down.
Worst keyboard I've ever had, hands down.