I would describe Pandorum as 'Descent' in space with a twist.
I thought the writer and director of this movie really tapped into the'fear factor'.
The thought of waking up from hyper sleep, disoriented, unsure of the status.
Then realising your not alone.
Alien captured that same fear.
Pandorum adds fear times 100.
On top of that, one crew member, Payton, is suffering dillusins, something that has put the whole ship in danger.
All actors involved make a good account of the storyline in that the performance make the viewer imagine what it must be like to face their worst fears.
On top of that, the ending has left an oppotunity for the story to be continued......I recommend this movie...not for the faint hearted.