Watched it tonight and thought it was fantastic, delivered in all the ways I expected Gunn to. Occasionally falls into the blueprint trappings most super hero films do, but for most part circumnavigates gaudiness in favour of colour, character, authenticity, and a self aware kitsch. Big, bright characters and personalities shepherd the script through absurd, hilarious scenarios that unravel in order to serve momentum to the narrative, much of which are evocative of true comic book pulp. More importantly though Gunn elevates the silliness and absurdity with strong delivery of a humane message and genuinely important social and political commentary.
It's not some ground breaking masterpiece or genius nuance, but it's carefully constructed with all the love, sense, and intelligence you want from the best films within this genre.
Guardians of the Galaxy 2 is, by a significant margin, my favourite film in the MCU. And this is marked similarly for DC's modern output.