Never been a huge fan of films such as this - but this film capitalises on the shock factor and the anxiety it induces. The initial shock is rather delayed, for the subsequent factors that build up during this film take it's place and almost make you feel asthough (main plot point) is the least of their worries. Watching this I almost felt a sense of guilt, its story line is nothing special but the characters that are introduced early and later on makes up for the fact.
This is, in my opinion, a great film for its budget and cast. This couldn't have been done any better than it is, a real piece of work that can be watched over and over again, watching the characters mistakes and noticable details of where things turn gritty.