I enjoyed the primary trilogy for the most part. It was a short and not overly complex, which is what I expected out of the young adult classification.
I think a lot of fun could be had with the story, but the writing wasn't strong enough to keep me interested the other books.
I mostly read it out of curiosity to see how it diverged from the television show that I'm about to finish up. I figured my kids may be interested in it also, so I wanted to give it a go.