I've been watching since the start and enjoy it although I cringe a bit at some of the historical inaccuracies. (Doctor's daughter joins the WAAF - just like that and ends up working at her local RAF station - hmm!) There was another thread on this a little while ago. The general consensus was that it was fine Sunday night telly although there seemed a lot of characters for a six part drama and the pace is moving quite slowly as we're only at February 1940 after four episodes. It seems as if they are expecting a couple more series at least because I don't think they can tell the stories very fully without more screen time. I'd be happy to watch future series.
On Pat's husband I have to agree that he is a very unpleasant study of a controlling, abusive relationship. I did wonder if she had deliberately poisoned him with the pilchards at the start. It does however, look like the interference of the doctor's wife is going to backfire and an overdose of some sort of tranquilising type drug is going to end up with the finger of suspicion being pointed at poor old Pat. I find the Welsh butcher's wife a bit annoying but I did find the scene where her husband waved his son goodbye quite affecting - can't imagine having to do that myself.