Let's say cautiously optmistic. The thing is, it's such a cool, and rather unexplored, premise, that they could all to easily fuck it up.
Besides that, I haven't had much time to be excited about Noire. First I was excited about Portal 2, then it got pushed back, then I was excited about Cry2, then was excited about Portal 2, then I was excited about M&B. Maybe now that I've got a bit of a breather I'll look into this a bit more, though I really don't have much money right now.
I am definitely not a fan of the fact that no matter where I get it from, I can't play all the missions... Hopefully that's released as DLC or something after release...