Saw the movie. I thought it was an alright film. Nothing great, but nothing offensive. It was entertaining.
I can see how people would enjoy the books.
There is really no reason that I can see to use words like "rubbish" or "drivel" when describing any bit of literature.
I think that there is something redeeming in every book.
It is a neat story. Not really to my liking, but then again, I'm a 38 year old man. But there is nothing patently offensive about it. It contains some violence, but it is not about glorification of said violence. It's a story.