Quiet but not known to the mice and keyboards center

The glossy black chassis attracts dust, the keys are matte and I hope that the information on these keys will remain as long as those on my CC 2000.
I use the CC 3000 with a laptop, so no question about the cable length (perhaps not the case with a distant tower of the work plan).
I do not know yet whether the fact that the LEDs are in the bottom right (not in plain view on top) is a pb.
The absence of lifting legs, I suppose, related to ergonomic keyboard character; this double curvature does not seem awkward to me (but I'm not a pro at typing).
The "Pause" and "ArrDéf." not make more than one, the "inser." joined the three top keys and press "Delete." is double size, I suppose by decision of a (e) designating = key between "alt gr" and "Ctrl" is no longer the "menu" but a "fn" key that is used that with 2 other buttons (pause / arrdef and Maj dr. who becomes the menu). Not sure that's really smart. Also if it has no impact on Linux (SysReq) and forget the shortcut Win + Pause is now 3 fingers.
I do not really use the multi-media keys, so that it remains only 3 of this keyboard does not bother me (although launch the calculator one touch is nice).
The recall of desktop shortcuts is nice (but it took time to understand why there was a star Ctrl).
This keyboard is not known to the mouse and keyboard Msoft center, so we can not change the condition of the keys.
Indeed, with silent keys, mouse now appears noisy; these keys are comfortable to type.
12 for a keyboard of this quality seem like a good deal; My son uses the same keyboard (bought in a store 20) for more than 2 months, not only in office but for his studies at stake, and he is also very happy.