Just got back from a Percy Jackson & The Olympians: The Lightning Thief screening and I kinda liked it.
It's basically Clash of the Titans for kids.
I wasn't blown away by it, but it did have some fun moments. The main protagonist was OK as far as these types of movie go.
The hero's buddy Grover was kinda corny, way too many puns for that one.
The movie wasn't quite what I expected either, the trailer was focused heavily on mythological elements like monsters and so forth, but it's part summer camp, part road trip film.
Expect some interesting cameos(some of them are a bit weird, such as Uma Thurman, which I won't reveal who she plays and Steve Coogan, for example) as well as always welcomed performaces by Pierce Brosnan and Sean Bean.
Some things do get a bit silly from time to time(like how the kids manage to get from place to place, considering a lot of the commotion they caused). But overall, not a bad way to spend 2 hours.
I give it a B.