Hellhole is a Polish horror film that has a great ambience to it. It captures the feeling of unease and unbridled tension that gives the viewer, in every scene, a feeling of dread.
The story twisted, turned and came out to a point that you wouldn't expect from the surface. It certainly ramps up halfway through and doesn't give you much time to process.
There are some unexplained things which can confuse you. Like a jump scare that's not really built upon as to why that certain thing is there. However, it gave me a good scare and it certainly didn't feel too forced. You're always on the edge, so it is amplified.
In conclusion, Hellhole is a good horror film that will keep you interested but may do too much and you'll feel out of the loop. Also beware of the gore because there is a lot.