Man I am big fan of Sculpt myself. I have 2 of them, one for home and one for office. Funnily enough I was struck by the "function keys problem" (especially F6 and F7 near the curvature), but usually keeping an eye on those keys and pressing them carefully does the trick (luckily those are not keys i use too frequently). It has another small manufacturing issue, when you use it for longer time, the nice "rubbery fabric" which the wrist is resting starts coming out from couture (point the suture?). But that's very minor thing. Also this keyboard is for people with big hands mostly.
But apart from downsides I think this is still the best keyboard ever made. 🙂