Makin' Magic is a pretty obvious attempt to cash in on Potter-mania. That said, it is a pretty big expansion, 3 disks, 1.3 GB, adding another remote area (Magic Town) along with Downtown from Hot Date, Old Town from Unleashed, and Studio Town from Superstar. And it has entirely new elements for this game, such as quests (necessary to obtain reagents) and the need to hide your magic doings from the non-magic Sims (which are not called muggles at least). If you make magic while non-magic Sims watch, a controller will appear and erase their memory as well as sue you. On the other hand, the more spells you cast, the higher the magic ambience on your lot, and things begin to happen spontaneously ... If you grow magical enough, you may move out of Neighborhood and into Magic Town to live there. Woo.
I expect to write a full review in the Chaos Node later this week.