Have you watched Sorority Row? Is it a good movie?

I haven't watched this movie, but I am planning to watch it when I got a chance. I just want to know whether any member of MyLot has watched this movie and what do you think? Is it a good movie?
I think it is similar to "I know what you did last summer". I read about the story of the movie, there are five girls inadvertently cause the murder of one of their sisters in a prank gone wrong, they agree to keep the matter to themselves and never speak of it again, so they can get on with their lives. After graduation, a mysterious killer goes after the five of them and anyone who knows their secret.
What do you think? I think it is the same idea of movie. They just presenting it differently.