I couldn't locate a past thread on this so I apologize if this has been discussed before. However I saw this last night and I give it 6 out of 10.
It was entertaining but kinda goofy in spots.
My 2 cents ...
-I liked the troll market but thought that many of the beings were weird just for the sake of weird.
-Battle scenes were cool
-A lot of Pans Labyrinth type stuff in this.
-I thought the German smoke dude was kinda dumb and he just looked like a deep sea diver walking around in that suit.
-Thought the teen Hellboy was a little disturbing. Just not right.