I have only watched Episode 1 of this series, and have enjoyed it. It is interesting seeing the workings of the CIA in post-WW2 Europe. The production values are very high and there are certainly some big name actors on show. But so far I have found the whole affair a little slow paced. I shall stick with the series and see how things work out.
Actually the second hour of the series is a little faster paced, but still found it a little hard to get into. The real backdrop of the Philby, McClean & Burgess scandal is especially interesting. But I found the BBC series Cambridge Spies better done.