Not as bad as most people say.
I was excited when the Sims came to Xbox, I've always enjoyed it on the PC and I wanted a dose of it on Xbox too.
The good:
It's the Sims on console. Simply put.
The game is very impressive visually without any frame rate drops, which really surprised me.
There's a massive buying catalogue with a lot of options, well, when I say a lot, there's enough options to satisfy, but never going to be as much as the PC.
The option to buy pets is definitely welcomed, although you can't buy horses like you can on the PC.
The bad:
Loooooong loading times.
It's just simply not as good as the PC version, the visuals are similar, but there's not as many features, and it's more difficult to control and use than the PC.
The pets can get incredibly annoying sometimes.
Overall:
The Sims 3: Pets isn't really that good of a game, it's underrated and not that bad, but it's a watered down version of the one on PC, and honestly, I'd rather just play that one.