1) Does it compare to his earlier series?
This one has characters that are not only very different, but much like his Dresden characters. Clearly the young Tavi, being of the 'cowardly hero who does everything for everyone else' types is similar to Harry the wizard.
2) How did you like his description and form of magic?
I like the idea, but much like Kelpie, I think he didn't think it through too much. Some of the descriptions and uses were not thought out properly including a later scene where two watercrafters are imprisoned. Unless this people's makeup is much different than ours, their bodies would hold enough water to craft without external help - unless he somehow qualifies it (which I didn't notice him doing, but it could have been there somewhere). Also, the windcrafter's use of their furies seemed off, especially near the beginning. Can't recall just what set that off (I read the beginning months ago in a sneak preview and skipped it this time around), maybe I'll re-read that first chapter and figure it out.
3) What about the betrayal at the beginning?
Good plot twist, good character motivations but it was sussed out too quickly for my liking.
4) Anything you hated? Loved? Wanted to argue about?
I disliked the water witch's name, Odiana - made me think of something odious, which may be fitting but seemed out of place. Loved the Marat, but they need more fleshing out, which I'm sure we'll get in later volumes. Kelpie, I had difficulties with the crafting as well, but it seemed to flow better after that first chapter.
More later, must go to bed. I will not allow myself to play on my newly repaired (FINALLY!) computer all night since I've got to work tomorrow