As expansions go, Apartment Life adds some nice variety to the series. It does not add anything new in terms of the graphics engine but does bring in some nicer elements to the gameplay. The sound changes little.
Maxis (and EA) must be stretching it a bit to maintain viable content for the Sims 2 series – especially with Sims 3 releasing in 2009. But Apartment Life is a bit more robust than Free Time was in terms of behavioral modifications and that makes it a bit more fun.
GameZone reviews The Sims 2 Apartment Life