I saw the trailer for that movie and found it fascinating! Glad to hear that it's as good as the trailer implied. :) (I also trust Alex Garland enough to have believed in it being well-constructed.)

I haven't seen it yet, and I don't know if I'll go see it in theaters; I like horror but I like it better when I'm watching it with someone, and I don't think my horror-watching buddy is comfortable with theaters again yet.