In general: Worth seeing.
Just got back from watching it in Imax ... wow, that was a great movie. Sure, there where holes in some of the events, but overall. Liked how it was about the story and not the action; was worried from the trailers and all it was all about the action (though the action they had was great)
Possible Spoilers below:
The end ... yes, heard the collective sigh, the one "What the hell?!?!" yelled out ... and than applause. Think that shows how good of a movie and how much it brought you into the story.
Overall, great characters that you get engrossed with, and with the plot / ending. Truthfully, I didn't see it coming, just because of its simplicity, and I think that is why I enjoyed it so much. During it, I was worried it was going to have some twist ... like so many movies do (ie. they are inside a dream, or they will get stuck in one at one point etc ... ) , instead, it is a mystery getting unfolded in layers and a story of the main characters path of acceptance over what had happened.
Watching it Imax, noticed it looked entirely filmed in the imax format, which was nice to see. (versus the Dark Knight which was only key scenes)
Now, curious to know if this movie is going to screw with my dreams!