I agree, but I liked it a little bit better than you.
I would give it an 8 / 10 or a 3 / 4.
It's true the movie did not have much new going for it. However, the film had a great energy to it and sharp dialogue.
It's also true that it fell into the more cliched aspects of the genre often, though. Even then, I liked most of these characters, and did not want them to get killed.
A good n' mindless time waster.