This was a fun one. The dialog and chemistry among the four main characters was what drew me in. Sure, not all the jokes were winners, but the banter was charming and felt natural for the most part. Plus, the choices made by the Good Guys were often smarter than what you find in the average horror movie (regardless of its budget). They seemed to learn from their mistakes and make reasonable leaps of deduction without my "help" (a.k.a. yelling at the screen, "Why?! Why would you DO that??").
I was disappointed with the antagonist side of the coin, though. I get that there was a psychopath vibe being aimed at, but psychopath doesn't mean zombie. Showing no emotion and practically shuffling through every scene seemed more Heavily Sedated than Crazy Person to me.
What really surprised me were the production values. Even in the dark basement shots the lighting was well done and the audio was consistently good in both interior and exterior scenes. So often it seems like sound quality in particular gets thrown out the window when the budget is tiny. Kudos sound folks!
Overall, I'd say it's a comedy/horror film rather than a horror/comedy, but I was entertained. And, most of the time, that's exactly what I'm looking for.