I have to disagree with Nick Stones review. Either he wasn't watching it at all or his interpretation was somewhat misguided.
I found this to be a good movie typical of the type of English crime drama i have come to expect over the years.
I thought the plot was well thought out and the twists and turns quite fascinating.
Yes one does have to keep focused on whats going on but that is the whole idea.
It kept me glued to the screen wondering who was going to do what next.
The ending for me was an ending i believe was appropriate. 3/4 of the way through i had a feeling it would end that way.
I was left feeling this was not a waste of my time and, unlike Nick Stone, i would recommend it.