See only if you like seeing one group of people chasing the other and stay away from hype

Rating: 5/10 (24 April 2017)

Since almost everybody's talking about the upsides of this movie, let me mention a couple of main downsides I found important.
Green Room is a perfect example of how hype can ruin the entire movie experience. Mine expectations had been very high due to unexpectedly high critical approval and user ratings. I felt disappointed half-way through the movie.
First, action is not at all fast paced or ample. From what everybody wrote, I concluded that Green Room must be something like Hardcore Henry; non stop mayhem put together nicely with music. But most of the actions is chopped and delivered in a few tense sequences. That's not necessarily bad but it surely slows everything down.
Second, this movie is not even a horror. Several squeamish bursts of action don't make a horror. Atmosphere is intense as in any other action oriented thriller. When it comes to violence, I have to admit that it didn't feel extremely violent like everybody is making it to be. All of the violence is usually brief and happens as a part of some other occurrence (nothing like in SAW series).
Third, don't expect good soundtrack even if you're into punk music. I looked forward to seeing a horror movie in which music may play some sort of pivotal role. Putting band on a spotlight really does seem like a good starting point. But no. A few screams now and there and that's all you're going to get.
Would I recommend seeing Green Room then? Only if hype didn't already precluded you from having a realistic expectations and if you're looking for a no brain cat vs. mouse game. If you want to see something scary or intelligent, skip it and see something better.