I quite enjoyed the books. A bit easy to read, but not too bad. The movies I thought were completely terrible. The movies, I think, was what turned the series into complete sh!t. Both the actors playing Edward and Bella were just bad. Kind of like Megan Fox? Total airhead with good looks (except with the Twilight actors, they don't even have good looks to fall back on ).
From what I've heard though, the director who did Twilight has made horrible movies over and over again (can't remember what else she made). Maybe they should have given the script to someone else =D