Joe D'Amato is regarded as a rather greedy hack by most people acquainted with horror. Now that's not too far from the truth. But before D'Amato started cranking out movies with an inverse relation between quantity and quality, he made this startling horror movie. Startling in the sense that it's actually GOOD!
Don't get me wrong. Just because it's good doesn't mean it's not exploitation. It has truly gory scenes such as a taxidermy which doesn't leave much to the imagination, nails being ripped off, some implied necrophilia and a particular scene of a "stew" being munched on with an extreme close-up which made my stomach do a somersault. Well done Joe for that! However, these gore scenes are spread out and in between them, there is some attempt to build suspense. There is some good acting particularly by the very creepy but oddly sexy Franca Stoppi(RIP) who plays the caretaker from hell, Iris. The cinematography (by Joe himself) is gorgeous in spite of all the carnage around. It doesn't seem like a cheap B-movie. The music by Goblin is as expected, superb.
That said, the movie is not perfect. It stagnates from time to time. There is absolutely no humour (except some unintentional stuff but you will be too busy gagging to notice) to lighten the relentlessly downbeat tone. Also, the lead actor can be too over-the-top sometimes.
That said, I am shocked that this is a film by Joe D'Amato. It would seem he actually had talent. It's tragic that he was so caught up in making money that he didn't fulfill it. The horror aficionado missed out on a few more quality horror movies.