Damiano Damiani has a certain feeling for making glossy thrillers which still retain a vestige of intelligence. This is not quite one of them. Lurking in it somewhere – or in the Moravia story on which it is based – is a quite interesting idea about loneliness, fantasy and the occassional power of illusion to win out over reality. But, as dramatized here, the relations of the unbalanced young hero with an almost equally unbalanced girl and her mysterious step-mother are quite lacking in tension, excitement or even basic credibility.
John Russell Taylor, Thursday Nov 27, 1969. The Times