I always enjoy them ,along with a huge pinch of salt .
Did so with this one too .

http://www.theatreofnoise.com/2016/10/bbc-as-echo-chamber-review-of.html

I watched it last Saturday night, personally I really like Adam Curtis's documentaries and enjoyed it as much as his others. Thing is, I totally agree with a lot of the analysis, so there is a danger of "echo chamber" but I'm not sure if there's a corresponding right wing documentary with insights as logical as the last half hour of this? Dunno. Am open to counterpoints but watching this it seemed like Curtis's "magnum opus" - like it was so long because he was coalescing many of his ideas from previous films. The points about adopting the Russian politics of illusion were first in a 10 minute (ish) piece he did for Charlie Brooker's Screenwipe a while back, and his points about suicide bombing were clearly researched during his earlier films about Al Qaeida and Islamic Fundamentalism, both of which I considered ground breaking at the time. Anyway, it just seemed like the film was so long because Curtis was trying to bring the jigsaw up to date (if not finish it).

I watched it in 2 halves, but a friend of mine took it in 4 or 5 chunks. Both of us liked it and he (my friend) was "blown away" by it not having seen any of Curtis's other docs.

Like him or loathe him, Curtis sure as shit does his research and I'd be impressed by any counterpoint that "joins the dots" as clearly.

Not his best by any means. As has been said elsewhere it is way longer than it needed to be. Then again so was Bitter Lake and that seems a much better film after a second viewing. His films on consumer culture, Freud, the roots of Thatcherism, zero sum game thinking etc were IIRC all far shorter and much more illuminating. However they do rely on a fair amount of pre-existing knowledge which frankly is going to absent for a lot of viewers. Especially when it comes to foreign affairs. So it may be that going for repetition over a longer running time is his way of drumming the information into us. Also in this age of resistance to any kind of complexity there is a lot to be said for anyone trying to work with longer formats. Just cos this one wasn't all that successful does not mean there isn't a good three hour film on geo-politics waiting to be made. Speaking of which, the third part of Robbie Martin's "A Very Heavy Agenda" on the fall and rise of the new-cons, (itself heavily influenced by Curtis) comes in at over three and a half hours!