Sam Worthington is about as "wooden" as Harry Hamlin was. And the story is basically the same (though there was more romance in the original, and Pegasus had more magic). But the effects in this version (while decent) aren't as interesting as the original Harryhausen creatures from 1981.
Another Greek story, now of the hero Perseus, who will be fighting many dangerous and deadly creatures releases by hell. A film too worthy of watchers.