From the outset this film leans towards being more comedy which doesn't take itself too seriously, than a superhero movie, and that really plays to its favour. The CGI is on the money, and acting wise everyone is pretty solid though Michael Pena is occasionally hard to understand and Evangeline Lilly's hair doesn't suit her (probably fits character though). Corey Stoll is an enjoyable antagonist too.
The well-written story also manages to integrate itself nicely into the Marvel universe and somehow be pretty epic on a small scale, pun intended. All up I can't really think of any negatives to this light-hearted action film and think that it's suitable for a pretty wide array of audiences - probably even those not into superhero flicks. I give ant man four train sets out of five and would definitely watch it again. Go watch it now! :)
Big thumbs up for you, Ant Man!