I used something like that for a while but I didn't really use the keypad side in practice and the quality of that remote was kinda crap so the most used buttons (normal remote ones on the front) quickly became unreliable. Also I don't find the airmouse all that convenient to use.

I replaced it with one of these plus I also have a perfectly normal keyboard and mouse connected to that mini-PC in case I need to directly use it (which is rare since even the homeserver stuff I normally do remotely from a normal Desktop PC via SSH).