I liked it, it was really over my low expectations, Kristen Stewart it's great, the story feels good, it's short like Every action movie should be. Nothing new, not the best but it's really enjoyable.

Underwater kept my attention throughout. It’s well shot with a fine cast, decent performances and plenty of suspense. The film is definitely better than most underwater creature movies. It doesn’t help that the comparisons are Deepstar Six, Leviathan or Sphere though. I left out the Abyss since just the marines on board are bad. Otherwise it’s the best underwater science fiction film.

a very very bad movie . nothing to understand don't loose your time watching it

Better than I was expecting, with a little more depth than other movies of this sort. Little chance to catch your breath though as it plunges you headlong into the action from the very beginning.

I like this a lot more than I reasonably should. It's by no means a cinematic masterpiece but it's a solid thriller that hold the suspense throughout. If you wanted to be kind you could call it a homage to Alien as they basically copied the Alien plotline and set it under water. As an Alien fan I guess that would be reason enough to hate it but I can't since they have done it really well and Kristen Stewart tackles the legacy of Commander Ripley spectacularly well. Stewart totally nails it as a badass mechanic with a grudge against the world and the rest of the cast delivers as well. Thoroughly enjoyable.