This is not a keyboard replacement, but an enhancer. It does not replicate the left half of a normal keyboard. Other than Ctrl, shift, enter, Alt, Fn, Num lock, it has number keys (not laid out in a normal keypad) and Z, X, C, V keys.
The intent of this device from my understanding is that for all of these keys, you can assign custom functions or macros to save key presses on a normal keyboard (i.e. something that would take 10 key presses on a normal keyboard could be assigned to one key on this).
Designers and possibly gamers are the intended audience.
added photo of delux designer keys