Just got back from watching it. It was a hoot! I agree, don't let the quirkiness keep you from going. Go see this. What really stood out to me was how the humor was actually funny! So many movies that have humor in it often don't make me laugh. This made me laugh, many times. And I mean that in a good way. I'd say this is an action comedy, with a bit of heist film on the side. The only nitpick I'd give it is it was a bit heavy on the CGI, but I'm used to that with these kind of movies, so no biggie.
The conflict between Hope and Pym I felt was unnecessary seeing how quickly it was resolved. They should have stayed more focused on the mission/heist stuff. Did anyone else catch the Spidey reference near the end? That made me happy. :D