I enjoyed the film - I am sure the historical inaccuracies will sail by most viewers, as they did me, but not my wife who is a serious history buff.
Some of the dialogue jarred - using the phrase 'O.K.' for example, and although the sexual dialogue is doubtless accurate, it's questionable as to whether omitting it would have harmed the narrative thread.
I am no prude at all, but I found the sexual language jarring, and as I said, unnecessary in my view - but as advised, Olivia Coleman's performance was wonderful/