Most of the people that will watch the series will point out that it is somewhat inaccurate or that it leaves out other historical significant events happening at the same time. This is 100% true, so if you are looking for a historical documentary on Eastern Europe and the fall of communism in the 90s, you should look elsewhere.
This series is basically archival footage of the BBC. Curtis selected from hundreds of hours of material the most interesting bits. And some of them are SO SO interesting. For example, the message that Gorbachev records from Crimeea where he was ousted by the military and that's recorded over his nephew ballet practice. It creates a different side to the reality which you would have never known otherwise. It humanizes the character, while at the same time showing you a sort of amateurish side to the whole affair... Or maybe it shows the crisis situation in which they were all in... There can be many interperations, and almost every single piece of footage is a gem.
I found many similarties between Russia of those years and what happened afterwards in the former communist block. Thanks Adam Curtis for creating yet another masterpiece.