Slow but mainly good acting

Clever plot; lots of twists and turns right to the last minute. Good period detail. Actors were all, bar one, brilliant, especially Minnie Driver as Mabel who uses her face wonderfully to express so many nuances of feeling. Julianne Moore gave me the worst experience in that I was aware of her 'acting' all the time; it fair set my teeth on edge. I do not know her but guess she is American doing her best with an English accent. It's not bad but her presence was excruciating to me; everything forced. She was probably just miscast; I am sure others could have managed the menace that she failed to adequately deliver. Other critics have mentioned the slowness; I agree. I contemplated turning it off more than once but the quality of the acting meant I carried on with it regardless. Rainy afternoon with a box of chox type film