I thought it was good for what it did. It didn't touch on game development as much as I would have liked, but I think that would have made it pretty inaccessible to a lot of people.
I also kind of found the Braid guy detracted from the movie for me. The other game developers all had a story arc, and this guys game had already been released, he seemed like kind of an asshole, and some of the stuff he was saying just seemed really pretentious. I would have hoped for a more intimate movie about indie games wouldn't give me that impression at all.
Other than that I thought it was really quite entertaining. Would recommend it.