Much better than anticipated, I actually thoroughly enjoyed 'Ant-Man'. The concept is silly, but I felt it made it work very well.
It starts off as more Paul Rudd-esque than Marvel-esque, especially with the comedy. I wasn't expecting much from it at that point, not that it was necessarily bad or anything but it wasn't what I'd expect from an MCU film. However, positively, it turns into something that fits in this universe.
I enjoyed the action, score and humour. The cast do good things, with Paul Rudd filling the titular role nicely. I also really enjoyed Michael Douglas. Evangeline Lilly and Michael Peña are pluses, too. Corey Stoll, meanwhile, is a little meh I will say - entirely passable, but nothing memorable.
This is a pleasant watch, one I'd recommend.