"One of the UK's primary folk-pop songwriters records a concept album inspired by Sylvia Plath's only published novel, The Bell Jar ... Hypoxia (the medical term for lack of oxygen supply to the body, and perhaps a reference to Plath's suicide) reflects the novel's muscular writing style; songs such as Mirrors, Beating Heart, Cuckoo, and The Mind has its own Place draw on scenes and storylines from the book, and Williams's combination of melancholy and melody is bang on".