I saw Ex Machina last night. It was everything I hoped for, and even a little bit extra.
It included what is probably the most daring and relentless portrayal of artificial intelligence since HAL; I would rank it on par with HAL. It's terrifying up until the very last shot, and yet the final shot is somehow cathartic. It's grim, doesn't hold back, and the question of humanism (both in terms of what it means to be a conscious human, and anthropomorphism) remains at its core throughout.
On top of all that, it has its fair share of humor, and it doesn't avoid the truly complex issues of AI operation (i.e. semantic models of language, language as innate versus acquired, the relationship between consciousness and simulation, etc.). All in all, this was an absolutely welcome contribution to contemporary SF cinema, which has exhibited an interest in AI as of late but has simply butchered it (I'm thinking of Transcendence, Automata, Chappie, etc.).
So, highly recommended.