I think both of the new Star Trek movies are entertaining and fun, in the same way that most action blockbusters are entertaining and fun. Switch your brain off, enjoy the spectacle, and be pleasantly surprised if the plot is actually interesting and doesn't have too many obvious holes. If you can enjoy them on that level, cool. Some people still won't like them, but whatever, you can't please everyone.
The group they tend to divide the most is the hardcore Star Trek fans. They don't like how a certain character is portrayed, or how something from canon was changed or ignored, stuff like that. And a lot of them still fall into the first category (the movie is still entertaining and fun) but a lot of them simply cannot get over the fact that it's Star Trek, but it's not "their" Star Trek, the one they know and love and expect it to be.