'My Best Friend' is one of the most fascinating documentaries I've ever seen about movies and acting. Werner Herzog and Klaus Kinski only made five movies together, but what extraordinary movies they are! Kinski made many, many movies, many of them absolutely awful (though all worth watching even if only for him). In fact it's difficult to think of any other actor of his undoubted talent who slummed it quite as much as he did. Herzog is regarded as one of Germany's greatest ever directors and made many fine movies without Kinski, but the two together were really something special. Just watch the astonishing 'Aguirre: The Wrath Of God' if you want to be floored by total genius! Much of this documentary deals with the trials and tribulations of that movie's troubled shoot, but their other four collaborations are also discussed. Their relationship was a complex one and really hard to get your head around. At times they literally tried to kill each other, but then there's footage included that shows their obvious warmth and affection for each other. You could say that this documentary provokes more questions than answers, and if you are looking for a straightforward explanation of Kinski's behaviour and what Herzog REALLY thought about him then maybe you could regard this as a failure. Anyway, I was enthralled and I think any fan of Kinski must regard this as essential viewing. From the opening footage of a raving Kinski on stage proclaiming he was Christ to the final moments of a butterfly flitting around his face this is mesmerizing stuff, and not to be missed by anyone with every a remote interest in this unique actor. Highly recommended!