Great movie

Rating: 8/10 (3 June 2015)

I found this movie interesting and satisfying.
It will make you thinking out endings and re-thinking them as you go along, and the ending will be surprising for everyone. Although (spoiler alert), there was a big plot-hole in the ending, Ava gets loose due to a re-programming of the security system that opens all the doors in a power-outage, but when the last power-outage comes after she leaves, he is still stuck inside the room. This ruined a great ending for me
But all in all a really good movie that will keep you on the edge of your seat even though its kind of slow paced