This is a good flick if you're trying to 'get away' from the daily situation, ... otherwise, it'd be a boring slasher film.
The plot runs smooth and the characters cover the gambit. Following the cast-aways, the dark and grainy takes over the enjoyment effect.
Anyhow, a very solid three. If I would have had to watch the last thirty minutes, this would have gone a 3.5 or maybe a 4.0.