Attracted by the excellent reviews given to this keyboard, I bought it without trying and I realize how silly it is. Yes I know ... Indeed this keyboard is unlike any of those I have used. The keys are halfway between those of a laptop keyboard and a traditional keyboard with large keys but are mostly quite uncomfortable in extended use. Touch is pretty tough and requires francs keypresses. They are far from silent (eg the space bar is very cheap) or noisy: I had to remove the "backspace" key that squeaked every support. Finally, the shape of the keys Space, Ctrl, Alt is very strange: these keys are curved and shaped differently from other keys does not facilitate typing. This is especially annoying if you hit with 10 fingers: When you want to do a Ctrl with a finger, half the time your finger will slip on the smooth surface and rounded the key. I tried to compensate for these problems by adjusting the inclination, but it is only one relatively small enhancement setting.
It has been 3 weeks since I use it extensively and I still can not find my bearings. This is a very personal opinion, but just a warning: try it before you buy because ergonomics "special" does not fit all.
Apart from that (but it is still the main, comfort), the keyboard is beautiful, very nice palm rest and enlightenment the most beautiful effect. It gives a great effect on my desk, a pity that I have to also be used to hit;)