"Credible in its characterisation, rich in mythological detail, and touchingly sincere in its treatment of alcoholism and trauma, the film is impressive in all sorts of ways.”
★★★★
- Nicholas Barber, BBC

"That it works so well is partly testament to Flanagan's skills as a horror director, but also to Ferguson, who is out-and-out wonderful, rarely needing to contort her lovely face, in fact somehow using her beauty itself to exude evil.”
★★★★
- Brian Viner, Daily Mail 

"For the most part, the adaptation and abbreviation from the book is smart and deft.”
★★★★
- David Sexton, London Evening Standard 

"Flanagan's real coup is taking us on an imaginative ride, making head-spinning sallies through space, and not feeling cramped by a single source of inspiration but embracing the lot.”
★★★★
- Tim Robey, Daily Telegraph 

"Hypnotic creepiness with crowd-pleasing gore and violence.”
★★★★
- Chris Hunneysett, Daily Mirror