The film is quite good. Joe Dante comparison is spot on, Tim Burton comparison on the other hand is a disgrace considering what kind of disgusting crap Burton has been directing in the recent years.
Rare Exports is an entertaining christmas fantasy and horror comedy. This is the original Santa, the one whose dining habits included eating children. The film isn't too graphic, though - it's rated '13' in Finland, a bit higher is most other countries. It is full of hilarious course language, though. Apparently the UK distributor went for subtitle censorship and did not translate the f-words. That's a shame, as the film loses a ton of comedy and one liners.
Glad to see it's been well received: the entire world from festival audiences to mainstream critics love it, with one single exception: The UK. I don't know if the "censorship" affected by the British press seems to hate the film.
Rotten Tomatoes rating:
http://www.rottentomatoes.com/m/rare_exports/
Not that I suggest anyone to be stupid enough to left critics' opinion affect their viewing decisions, but it's interesting to follow what the reception is like. Currently 89% positive.