In my opinion a really interesting sequel, with very effective moments. It works since it gets to concentrate uniquely (or mainly) on the behavior of these good looking guys and girls, under extremely strong stress.. Story's very solid because the viewer feels tension growing more and more, understanding and perceiving the character's realities, both physical and phsycological. The movie's suspenseful and the almost unknown cast doesn't cut a poor figure at all; probably it's not based upon events really happened, as written in the credits, probably their stories are simply invented but the threat seems real, that is enough. Was shot in Malta, surprisingly.