Not that bad actually, it was a pretty cool ride and the world leaves you with so many questions. About the ending, I don't think it is actually that bad either, as we never really find out why the maze was created and for what purpose. The reason given to the characters was a deception, so there really wasn't an explanation given at the end. I think Maze Runner did a good job, and had a greater story and less cliché universe than the Hunger Games. The only real weakness of the movie are the characters which are super bland and 1 dimensional. I'd recommend people giving it a look when it goes to retail.