Well, that was an ending. From what I've read in this thread, I think a few of you aren't going to be happy with it.
Me, myself, quite enjoyed it. Instead of spending two and a half hours getting answers to questions from the past, it focused on the here and now for the characters we've watched grow for six years.
And, since it is LOST, you're still left scratching your head. That's probably how it should be.
It's been an interesting ride, that's for sure.