I really want to check this out. I've been watching 2 guys play it at work. (We have some down time right now) That being said: classes start Jan 9th, I really don't think I should pick this up for a while.
It looks like a lot of fun and the companions look really interesting with the ability to send them out to do objectives for you. Having been a longtime wow player I'm really interested since Cataclysm was annoying. The holochrons in the worlds are interesting and I guess help people to explore more. They've definitely done stuff that wow hasn't. (And other older MMOs too, but I haven't played some of the more recent ones like Rift)