The reviews are uniformly positive, with praise centred on Hitchcock’s ability to make ordinary family life threatening. Most critics identify the darkness beneath small-town respectability as the film’s chief strength, while Joseph Cotten and Teresa Wright draw repeated praise for making the uncle–niece relationship convincing and unsettling. Suspense grows from the niece’s dawning suspicions, with camera placement, staircases and lighting helping to turn familiar domestic spaces into places of moral unease.
The differences are chiefly matters of emphasis rather than verdict, and the spread remains narrow. RogerEbert.com notes plot implausibilities and clichéd supporting characters, but finds that neither prevents the suspense from working. The New Yorker offers a more provocative reading of the town’s decency, suggesting that the killer’s bleak understanding of life carries more force than its neighbours’ virtue; elsewhere, the emphasis falls on lost innocence and menace within the family.