It's a movie based on a comic book and cartoon series, so any expectations of a plot should be kept along those lines. Some of the dialogue also tends towards cheesy over-the-topness as should be expected, especially from the bad guys. However, don't let the source material make you think it's a movie for kids. The action tends towards the extreme at points, lots of violence, and plenty of stabby parts. Definitely not a movie you'd want to bring little kids to. It's really a movie for the big kids.
What did I think of it? For the type of movie it is, it was awesome. Where can I get one of those suits?