Not too much iffy stuff, but not aimed at kids, either.
Parents need to know that this sitcom includes some racial humor exchanged mostly among characters of color -- but it's meant to be lighthearted, not hurtful or offensive. Most of the show's comedy is driven by its quirky characters, so tweens may not grasp the cultural background necessary to appreciate the humor. Between that and the fairly frequent references to sexuality (not much is shown, though), the show is obviously meant more for adults -- but there's not too much here that's inappropriate for older tweens.