Tim Faust’s review published on Letterboxd:
A stylish and sinister horror film, that is filled with great shots and interesting camera techniques. I am currently trying to watch most of argento's films that I have not seen and I loved this one. It has amazing sets and the acting was pretty good as well, the opera setting and music really fits the terrifying atmosphere that this film has. My only gripe is the ending felt a bit too over the top and while the metal music works in some of the other films that I have seen from him, in this one in my opinion does not fit the tone of the movie. Still I really enjoyed this one, and is definetely a must watch to see all the awesome scenes, especially that peephole scene.