good action and suspense

This is clearly a guy movie, so I'm surprised I enjoyed this as much as I did.
The storyline is pretty simple: 5 guys are locked in a place, with very little recollection of what happened, how they got to where they are, and no memory of who they are. Who's the bad guy? the good guy? No one knows. The suspense is there, and is quite successful. Not one boring moment. And not very predictable, even if somewhere down the line, the story that comes out is expected!
Good script, believable story and a nice cast!

8/10