So I purchased this keyboard on Amazon. So I found my ergonomic keyboard with a palm rest in soft moss, pleasant to the touch keys, the inimitable ergonomic shape, the opportunity to do so lean forward or backward, additional keys of the keypad side ( key = ()) convenient for Excel, a set of programmable key, and many pre-programmed shortcuts (Help, Undo, Altarpiece, New, Open, Close, Mute, Sound ++, Son--, Zoom, Calculator ...) . It is a robust keyboard, although the slight gap between the soft keys is a little OCD (also present on my first default keyboard but the keys remain attached :)!).
This keyboard really respect the natural wrist posture. An adjustment period is needed, but I got completely accustomed long ago. This is a keyboard that always impresses with its imposing size (allow space on the desktop) and its shape, which disconcerts everyone, even those accustomed to typing with their 10 fingers. The return to a normal keyboard is destabilizing =)
Can run with or without specific driver (light and discreet driver is necessary for operating the programmable keys). Works under Linux (but no driver provided for the programmable keys). A very good deal for this keyboard bought ~ 40.