Thoroughly enjoyable, greatly helped by having Sarah Paulson in the lead role; the sport of role that with a lesser actress could have been played at too high a level of hysteria but here, not so.
There was a pleasingly slow building of tension and an excellent scene where the daughter had escaped from her locked room to find out more about what was happening (with a very smart way of breaking a window, using water held in the mouth and a candle) but then had to get back onto the room once she heard her mother’s car approaching. It recalled a similar brilliant scene in Misery, with again, a wheelchair-bound hero.
The ending was deeply dark - in fact the final scene really left one shivering as the preceding ‘final’ scene could easily have been the true final; conclusion - but the film-maker was not going to let us off so easily.