I am very late to this ballgame, but I binge watched all five movies in three nights this week. Admittedly, I did not read the books, but I think that the movies were interesting and kept my attention throughout. In particular, I really like the complex dynamic between the wolves, the vamps, the people, the other vamps and the Italian vamps. Each movie seems to have a primary crisis of some sort that leads to a significant moment of resolution at the end. There was a lot of hate floating around the reviews about he way this installment ended, but I kind of liked the bloodless victory at the end, the "happy ending" and the hint at further adventures and developments that we will surely never get to see.
I don't go in for the maudlin, teen romance flicks, but the science fiction/fantasy wrapper and the world building that really comes out in this installment more than made up for a any moments where I was tired of watching the three leads fight, kiss and make up, fight again, change their minds, etc. Really, that was under control to some extent by the time this movie came along, but in earlier films of the series it was a bit tedious.