It looks like they would have taken some Chinese OEM keyboard and put it inside a new tray. Looks cheap.
If the function key symbols need text legends as well then you've failed in drawing them.
I dunno what the Forward and Back keys do, but the symbols looks like those typically used for Indent and Unindent.
Having all function keys in one line is also a fail.
The convention of having groups of four has the purpose that keys are easier to find again by remembering their spatial position.
A better layout (used on many keyboards) would have been to use a 1/4 unit spacing between each group and use the extra space to place a single key on the far right.
If you want the Alt Gr key to be bigger and easier to hit, then why not make it wider?
Edit: Also, I'm not sure about the front bezel. It is not wide enough to be a wrist rest, and it is not slim enough to not be in the way. I expect it to be just uncomfortable,... unless that is the point: to make users type with their wrists hovering above the keyboard... (?)
Oh, why do I bother. Now I have written a long post for what is essentially yet another useless gimmick - keyboard.