My sister likes it; unfortunately (for her, at least; I couldn't care less), it's not currently installed... actually, it's installed on the hard drive that's offline, so either way she can't play it.
I've played it a number of times, and it really doesn't hold anything for me. It's fun to build a house, to a point, or to mess with your Sims, but I feel it gets boring easily. For a point of reference, I've been playing Tac Ops for UT a lot on my iMac recently, and Starcraft before that. If you're not the hardcore action gaming type, you might enjoy the Sims more than me... then again, you might find it boring as hell.