Being the first to post that has watched it I suppose I'm obligated to make a thoughts thread.
I like it. It was good to hear Bill's voice again. I wasn't wowed by it, but I was thoroughly entertained. And I can no longer take the word Cerebro or Magneto seriously.
I don't think the whole "riffing a good movie" thing turned out to be much of a problem. Kind of a Y2Kesque problem. The jokes were just focused more towards the situations and characters and puns vs crappy acting or directing.
EDIT: I don't mean to imply that the acting or directing was good, it just wasn't crappy. Also, I would have said my favorite riff, but I have no idea how to spell it. It's what Alpha 5 would always say on power rangers, sounds kinda like "I I I" but with some Y's in there. Any way... it was funny.