Terrible.
Seriously, this surprised me. You see I like movies. A lot. I can usually find something that I like about a movie.
Nope. Not this time.
I would not recommend this at all. I usually rank movies as theater, dollar theater, redbox, or free. But this time is DONT WATCH.
I found the plot non existant. There was no moral lessons. The pace dragged. The dialogue dragged worse. There were a couple of cute moments that made me smile, and even one or two that made me laugh but overall, the movie flopped. I was worried about turning a 15 page children's book into a full length movie and it happened.
Some critics call it an "honest look at childhood", or "refreshingly free from commodity film components" but I just call it weird. You could argue it was art and it doesn't have to make sense but art is at least pleasing to look at. The film location was dry and colorless. Lots of shadows, dark branches and rocks. The only cool thing was the technical achievement of making the monsters face portray emotion but one technical achievement doesn't carry a film. (unless your Avatar and your technical achievement is going to change film)