I saw this today. It is good. I expected to enjoy Rocket the most, and while he was my favourite character, it was a surprisingly close call. Everyone got a dose of pathos, balanced nicely with the comedy. There were a couple of small misfires, such as too-rapid action scenes, but they were definitely small -- the whole thing came across as a pretty glorious romp. Interesting that the post-credit sequence contained no teaser for a follow-up movie, though (can't imagine will get a reboot). Marvel clearly weren't sure this was going to be the success it has been.
Did others feel those box office receipts were justified?