Have just finished the first book of Keith's trilogy and I must say I enjoyed every moment of it.
I found the story to be clever, with enough minor twists to catch the unwary and also throw the more 'jaded' reader a curve-ball. The characters are likeable and varied enough to be more than just cut-outs designed to appeal to a certain audience and age.
The way the story develops, revealing new elements of its structure is, in my mind, akin to a master jeweller revealing each finely cut facet of a diamond as he polishes it. In fact as novels go, this probably drew me into its story far easier than most.
This story is, in my opinion, one I would heartily recommend to anyone with an interest in good storytelling, not just an interest in fantasy.