I'm in the process of reading it right now, but I'm not all that far yet. Although I am enjoying it, there is one thing that annoys me, and it's the CONSTANT references to the previous books, in an almost Family Guy-esque "Hey, you remember when we (insert event from first or second book here)?" and I just want to tell Colfer "You know we've read these books already, right? That's why we're reading this one in the first place!" Does he quit doing this later in the book?

But other than that, it's a quite enjoyable read.

EDIT: Arthur calling people "mate" kind of bothers me a little as well. He's far too stuffy for that.