Barebones is a little black box theater, but it fits a fantastic set and some effective practical effects. (It’s based on a Stephen King novel, so bear that in mind.)
The battle of wits between complex characters who don’t make the kind of dumb mistakes that people make in horror movies was just thrilling. Great acting and direction.
And the soundtrack of 80s hits and story-appropriate oldies was just perfect. The lightning punctuating the events was perfectly timed, the costumes, the props, everything intimate and credible, down to the animal doorstop and the crucifix on the wall.