A thoroughly enjoyable superhero movie.
A short prologue establishes the premise: Michael Keaton is busy cleaning up the devastation in the aftermath of the first Avengers movie—you remember, the one with the Chitauri invasion. He and his crew find all sorts of neat technology, on which they expect to make some money, but then government bureaucrat Tyne Daly shows up, summarily fires them, and sends Keaton and his crew on a criminal path with the gadgetry they manage to hold onto.
Years later, Tony Stark recruits Peter Parker/Spider-Man for help in his spat with Captain America. This gives Peter some starry-eyed visions about someday becoming an Avenger, but Tony clearly wants the teenager to lower his sights, becoming (and I quote) a "friendly neighborhood Spider-Man", rescuing kittens from trees and apprehending the occasional local hoodlum.
But one night he notices some thugs using Chitauri tech to rip off an ATM…
Despite this being yet another Spider-Man reboot, the filmmakers eschew the usual origin yarn; in fact, they leave that kind of hazy. Peter's infatuation is with neither Gwen Stacy nor Mary Jane Watson, but with Liz, a beautiful fellow student.
Bottom line: it's a lot of fun. Tom Holland is excellent and believable (to the extent that any of these flicks is believable). No surprise, Michael Keaton continues to be a great actor. And (comic book faithfulness be damned) Marisa Tomei makes a very, very hot Aunt May.