Little Sci-Fi gem
Really enjoyed this.
SPOILERS
I was initially very disappointed that they killed off Ava and turned her into a robot. (The poster does not really indicate/show it's her). But I stuck with it, and it turned into a very nice film.
The ending was a great pay-off and quite chilling, but also very realistic.
Good to see Mr. Wedge Antilles in this. He played a proper scumbag. And did well.
It's one of those films, that make you think. Well worth a watch. I agree with other people that this is better than Ex-Machina.