If you liked Magnolia, I think you'd like Crash. It's not as funny, but it's not meant to be. It's not as long, either. But it is very good.
Although a few questions are left unanswered, I'd have preferred a more red herrings along the way. I like bits that don't join up and aren't meaningful. In part because life itself is like that, but also because it makes it harder to guess what's going to happen when lots of what you've seen is actually irrelevant.
Nice to see Marina Sirtis as someone other than Counselor Troi for a change.