Low ratings from low-IQ viewers, I guess. I thought it was excellent. Yes, claustrophobic, as it all takes place inside a single dark prison cell, but the acting is top-notch, it's emotional, it holds your attention. It did mine. I just finished watching it and I'm kind of gutted. The daughter, in a brief performance, is wonderful. I'm glad I watched and I urge others to watch with an open mind. This is worth your time.