I agree, he was good, which makes it even more surprising as it's not what I expected when I first saw him at the start.
I liked it because it was more balanced than the usual BBC cannabis documentaries which are usually presented in a way that gives the viewer the impression that they are being fair and looking at it from both points of view in a balanced way yet are really biased against cannabis and use myth, fantasy and tabloid-style scare stories about psychosis and all the usual crap. They often use an element of fact and truth in their documentaries to give them an air of legitimacy and credibility, when in fact they are nothing more than part of the sly goverbent propaganda-machine that profits from the abuse of cannabis users who are often sick and vulnerable.