I watched Predators tonight...
It was bad. Not just your regular type of bad, but the type of bad that is full of clichés with pretty much flat and stereotypical characters you always see in action movies (like having the African guy that carries an AK-47 and that has the bad fortune of dying first, a tough Latina chick, a Russian heavy weapons guy with an accent, an East Asian that wears a suit, uses a pistol and is skilled with a sword, and a "nerdy" guy that turns out to be a psycho killer), predictable story, predictable moments.
So unless you're going to watch it to laugh at how mediocre it is (or to see green blood) steer clear.