This is a very cheap-looking, badly acted C-grade movie. Besides the cringe-worthy special effects, nothing in the movie is explained or even makes sense.
What in hell are the smoke things supposed to be? Sometimes they leave people alone or just knock them off their feet, but at other times, they turn them into slobbering zombies or kill them outright. And the scenes of Istanbul being attacked looks so fake; like a computer screen-saver.
The teenage girls are way too irritating and one of them especially keeps freaking out and screaming for most of the time she was on the screen. I was actually happy when she turned into a zombie and stopped shrieking.
If this is what the apocalypse looks like, then I would say it lacks a severe deficit of vision and imagination on part of the director.
The lead actress was quite hot though; so one star just for her.