If she's tried someone else's Compact, and liked it, find out whether that still had the factory grip or if it had been re-shaped/modified in any way, in which case you'll have to attack yours with sandpaper, dremel, etc as appropriate.

Also, familiarise yourself with where this gun will need the occasional spot of lubrication with a good quality oil (the manual isn't any help on this point), namely the three main pivots as follows:
Rear of air cylinder/valve housing to frame,
Front of overlever to frame,
Tail of piston rod to overlever,
and then also the piston seal itself, which can be lubricated via the small air hole in the side of the air cylinder.

Iain