I have read the book about 10 times,I am a fan of the writer,Len Deighton,he is a World War 2 nut and obsessed by detail,which seems to be unpopular nowadays.
I admit it was a difficult first episode,the plot is not clear at the moment but I hope people will stick with it,I am sure it will grow on us. If people are expecting a fast paced thriller they will be disappointed but I think it will turn out to be a quality production. No plot spoilers but Deighton is a World War 2 expert who has upset some people by pointing out facts from 1939-1941 that some people want to ignore or forget. I did not have any problem with the so called mumbling,I would have liked more pace but I really don't understand why people are being so negative about this production. As for the constant comparisons with The Man In The High Castle,I know that book and it is based on history,unlike SS-GB.