I just picked mine up from Best Buy. To my knowledge all it is is more cars, the ability to build a big garage and one new trait. So, it's not much. I'm sure I might have missed a thing or two — I think there's special fashion stuff too. It's $20. And the boss (Mrs. Metro) did not say no.
Yeah, I debated too, originally, but had decided to get it. Which is just as well, since my game won't work since I installed the update.
Hopefully installing FL will fix the problem. My mom is being a real sweetheart and going down to the local Walmart to pick it up while I get ready for my doctor's appointment. Back to the topic, though: new clothes and hair? Want it! You'd think I really liked to play with dolls as a kid.
As for cars, I've been happy with 'the Beast', but new cars could be cool.