The series is well acted. The complaint here about "cliches" is itself one. Look up the history and look it up from first-person, eye-witness research. The events are based on real-life experiences and the protagonists being women should not frighten away legitimate historians who understand the time period and the sacrifices British women had to endure. The shape of the events are far closer to real history than some of the bleating-heart (not a typo) critics imagine. Yes, it is a soap opera. That was a given, by the way, to anyone who started watching it. But the position of women in Britain during the war and the dynamics that could and did occur are a part of history that also shapes the future for that society. For that focus, alone the series deserves respect.
If the negative critics of this series are Americans, they can be forgiven for their ignorance. If the critics are British, they can only be apologists for the behavior of officials who had totally lost their moral bearings.