Really, really surprised.
I passed this up a few times thinking it was just another B movie with little to no plot and a cast of characters I knew little to nothing about.
I could not have been more wrong regarding the movie as a whole.
It was wildly entertaining, darkly-funny, well-acted (everyone, from the landlady on up was believable and seemed to be comfortable in their roles), and while the lore may have been done before, it had not been done like this.
I liked it a lot.
I looked up "Ninjas" on Thesaurus.com and it said "Ninjas can't be found." Well played, Ninjas. Well played.