Currently living in Rockville, somewhat familiar with a handful of complexes due to friends and what not.
-Halpine view is a decent safe quiet complex, also near the twinbrook metro.
-Any of the complexes near Grosvenor Strathmore are nice and generally well rated, the high-rises in this area are generally older than the mid-rises.
-Pike & Rose has a ton of brand new highly rated stuff.
-The Shady Grove/Gaithersburg region has some cheaper new apartments (Rio @ Gaithersburg area), but that places her further away from the city. Parking will likely be free in this area though.
Is there a particular budget range? Would help to narrow this down a lot.