Slow burn family grief drama turned horror... fizzles in the end

Rating: 9/10 (14 June 2018)

This film will be too slow for many. But the slower, quieter moments ground the film brilliantly. Family drama and grief, mental illness, and bizarre visuals involving miniatures (that should have a better thematic payoff later but end up as nice visuals more befitting a different film.
It's well put together visually, with some great acting, even in some (emotionally) extreme moments. (Gabriel Byrne is a little understated but works as a sort of 'straight man' amidst the insane.
Which brings me to SPOILERS:
The film is visually impressive and almost painfully (in a good way) deliberate in its pacing until, eventually the supernatural bits overtake the much deeper family melodrama. The ending feels too conventional and also strangely tracked on; a final explanation even comes in voiceover that may very well have been ADR-ed after test audiences were confused.
It's strange-I loved this film until somewhere in the third act when it turned too far away from the grounded place it has built for itself. Had the outlandish ending been in Toni Colette's character's head, I think it would have been an easy 10/10 for me.