Very good overall, story was interesting, characters (and there were a lot), old and new were great, moved along very quickly, lot of edge of seat. Marvel went all out to make this a movie for their most dedicated fan base. There was a lot of cheering when certain obscure characters came on screen as well as nuggets of conversation that I think only Marvel nerds would pick up on. And there were a lot of them in the theater. Speaking of which, it was also a very diverse audience, a veritable melting pot.
Also, know how high your truck is when going onto Storrow Drive. There are a lot of signs.