One of the best thrillers I've seen for ages, the story has plenty of depth with many intriguing twists and turns in the plot, but Ridley Scott's story telling is so good you never find yourself wondering what's going on. Although the film also has many action packed and tense scenes, I became so immersed in what I was seeing on screen that I found watching it became a strangely relaxing experience; thoroughly enjoyable. It reminds me a lot of one of Ridley's brother Tony's efforts: Spy Game, with Robert Redford and Brad Pitt (another excellent thriller).
I wasn't much of a Di Caprio fan, but I've changed my opinion of him after this performance. In the past I've always thought he's a little flimsy to play hardman roles (he just about pulls it off in Departed), but this time he's matured enough to make a very believable CIA Operative. Russell Crowe is also brillant as Di Caprio's odious boss, he appears to have fattened himself again for this role.
The Blu-Ray presentation is also faultless; wonderful details and colours (the rocks in the desert scenes can be picked out for miles), and the sound is also excellent.