I just finished watching it and I think it is really promising. I hope they develop the different characters so that we care about them over the series. And they better not cancel it 5 episodes in before we even know what The Event is (like Happy Town).
I had hopes for Happy Town, too. Oh well.
I watched it. It seemed to be pretty good - early to tell, and it didn't quite have the dynamic start that Lost did (that really was a great intro to a show...annoying engine and all).
Perhaps it was my imagination, but it already seems we might be dealing with a couple of universes. I already deleted it off my DVR, but I seem to remember that, just before the plane crashed, the area the President was not being effected by the singularity (ie, the wind), the first time it was shown. I could be wrong, though.