OK, I'm clueless about tinting. I did a forum search, but it hasn't really answered my questions.

I'd like to get some tinting done, but want to keep it legal so as not to deal with the cops. Do the laws vary state to state?

What is legal in NJ? Also, is it OK (from an aesthetics standpoint) to just do the rear windows and the hatch window? Or should I get a full tint all around to make it look uniform?