Generally ok, but having lived in the London in the late 60s I found the supposedly early 60s dialogue and some details were incorrect, in fact some dialogue was positively straight out of 2014 (ie when it was written). I suppose younger viewers would not have noticed, but ordinary language and mannerisms were different in 62 until American influences crept in from the mid-60s onwards. I found it a bit annoying, rather like the modern perception of the 60s is that we all wore Hippy clothes and said "Groovy, Man" which is absolutely not the case at all. Shame the TV crew didn't research it properly (all too young, maybe?) As others have said, the acting was a bit soap-opera standard at times and yes, the ending was very strange indeed!