[Ronan] gives one of her finest performances in a two-hour study of addiction that is poignant, sometimes beautiful but always painful to watch — and would likely be too draining if not for the luminous presence at its core.

Ronan’s performance holds our attention. She is astonishing in this role, able to harness both fragility and determination in equal measure. She dances alone as if exorcising demons from her body, pretends to conduct waves on the beach with unparalleled joy.

These relationships are poised to be explored in more depth than they are.

Tim Robey

The Telegraph