Just saw it a couple of hours ago.
Pretty fun movie, and most of what I wanted to say in the immediate reaction was already said in previous posts. The only thing I'd add is that there's an odd sort of pacing issue in some of the action scenes: we follow the primary fighters (Ant-man, Wasp, Ghost, etc) around as they dance around the area, and the secondary characters get hit once to be taken temporarily out of commission until the plot needs them again... but continuity-wise, they're still there, and I end up wondering why they haven't been accidentally stepped on or something during the fight, before everything calms down again and they pop back up to continue their lines.
This happens at least twice I can think of, although there might be more that slipped my mind.
I suppose the gist of the movie is "don't think about it too hard".