Rare excellent story - you cannot predict whatsoever
When's the last time you saw a film and could not even come close to predicting the ending.
When's the last time after you saw a film you had to call up your best friends and tell them they have to see this.
When's the last time you had a guest over and asked if they wanted to see a seriously twisted film - you couldn't resist that a near stranger would miss the chance to see this.
If you're in the mood for a mind luck (ie. if fish = lish ^_^) you will not want to pass this up.
Way way fun.
Can be watched - and seriously enjoyed - multiple times --> no small feat these days.