Malus, I'm sorry about the late reply.
I should have been more clear: I feel that 75% of this novel is very good stuff. I would seriously recommend it. The other 25% of it, though, which is the last quarter of the novel, left me underwhelmed.
Where the mannerisms are concerned, I thought Gav did a VERY good job in this novel. I apologize if I came off conflicted on that one; I mean, if I had to pick one thing that was done very well in this novel, mannerisms and exchanges between characters would be it.