So, I finished this today. I really enjoyed it and found it easier to keep up than I was anticipated. I liked the characters a lot especially Claire and Calvinward and warmed to Pugh very nicely. I wasn't just as sure of Mathew's actions and his change of character (as Hex mentioned earlier, I think) but that's a minor quibble.
Anyone on the fence about getting it- I'd reccommend it. A different setting than most fantasy, really well realised descriptions, and a cracking story.
(PS mods - should this be in Sue's forum? I struggled to find it... )