Oh man, I really liked this movie, it was so much fun. I got some nostalgic 80's group of teenager themes set in an apocalyptic alien invasion world - and I loved it!
I laughed out loud a bunch of times and I appreciate the movie not taking itself so seriously that an explanation is needed for *why* the alien is chasing them or *how* they crossed x amount of miles in so few days. It's an entertaining movie, not all art is serious, much less perfect constructed.
The stereotypes did make me uncomfortable, however, because they are so purposely a part of the flim and especially because of the brief bit about a children's movie being used as a metaphor for race and conflicts of the working class, I believe McG was trying to bring to light something more pervasive and nefarious about human nature, but it fell flat.