I was recently coerced into reading this series by a coworker, and though it's not nearly as good as people make it out to be, it is definatly an easy read and well-worth the time.
The author does a good job of portraying Bella as an angsty teen and narrates in a way that keeps readers interested.
The only real problem I have about this series is that in Twilight and New Moon the reader is put in a world where nothing exists but Edward, Bella, Carlisle, Alice and Jacob. The other characters used in the book aren't fleshed out and don't have a history of their own. Most of the time being used to push Bella to one of the fleshed out characters so something interesting can happen.
This is where I find Eclipse starting to fill in the gaps. Within the first half of the book, we're explained Rosalie's history, the Quielutes(sp?) history and Jasper's history. Other people around the couple start getting much more involved with the story, which is a refreshing departure from the problems-with-edward, make-me-a-vampire sections which have filled most of the previous books.
All things said, this is a good read. It's hard to put it down once you've gotten started though, so make sure you have time to read it.