The Matthew Macfadyen ("Tom") centric reviews, of course
Variety:
Matthew Macfadyen, a sleazy standout
and
Each family member follows his lead in their own deranged way, particularly Macfadyen, who brings into each scene an aura of menace and the stench of impostor’s flop sweat.
Collider gives it 4 stars
NY Times (possible spoiler!)