An original idea, but far from a 'great horror film' or even suitable Krampus film.
I actually wrote about what I thought about the film. Besides its poor ending and inconsistent storyline (i.e. switching between German and English - for no reason) and beautiful animation, to suddenly, back to played out dark comedy (that's not too funny) with rather unsympathetic characters who you don't care if they die or not.
Here's what I thought about it holding true to the Krampus myth:
http://www.antagonists.ca/2015/12/kr...movie-vs-lore/