Well-shot and effectively suspenseful

Rating: 7/10 (11 December 2018)

Lots of chilling scenes helped by great direction and cinematography. It didn't surprise me when I learnt later that the director is also behind Ex Machina. The dialogue is both good and awful at different spots. The acting is nice.
Very high-concept with a real sense of mystery, scary at times but short in action (thats absolutely great it wasn't an action thriller!). I had a fair share of plot holes and questionable decisions, but overall it is a captivating experience. My desktop monitor is not large enough to capture the full experience but at least I can say now that I watched it, and liked it.