I've been ridiculously looking forward to GotG since the first trailer dropped and I think I was definitely influenced by the insane amount of hype I had for the film, but it did not disappoint.
I loved the infusions of 70s and 80s Earth pop culture since that is the last bit of Earth that Chris Pratt's character knew (in the first 5 minutes he's abducted from Earth circa 1988).
It was an origin movie with a hefty amount of exposition, and was a bit slow and clunky to start off with, but after a certain point (about when the Guardians started to come together in the first 1/3 of the movie) I started smiling and didn't stop.
I don't think it's a Star Wars level film like people are saying, but at the same time, if you compare it one-to-one with Star Wars: A New Hope and not the trilogy as a whole . . .