The story is garbage. The acting is horrible. The main actor cannot act, it's like they just took some dude from the street and put him in front of the camera. And his character is a dirtbag. Who sleeps in his jeans? Who takes a nap with a fully loaded gun in his hand? The wife, cannot act, not pretty, just a plain face, nothing to look at, just plain nothing. When she got the call that the maid was dead and told the husband, nothing, no shock, no oh my god, just plain nothing. Nothing. What's the story with the bum friends? The best line is when one of the bums asks for a light and switched the cigarettes! The comedy sucked. Some of the killings were OK, nothing great. The maid in the park idea was good, but seriously poorly executed. The rock music was horrible, Truly horrible. Some mentioned that Deep Purple was thinking about doing the music. I am glad they didn't get stuck in this garbage movie. The rest of the music sucked too, especially the drum/bongo crap towards the end. Truly annoying. Then we get to the part of the dead eyeballs capturing the last thing the victim saw. Was this supposed to be sc-fi? What the hell was that? Then the wife comes in with the medallion of the flies. Oh, now it all makes sense. She's crazy, so she concocts this elaborate scheme to torture and kill her husband. Then she tries to take off, and for dramatic effect, crashes her car into a truck and gets decapitated, with poor effect. After the car crash a head is shown rolling in the street, no blood anywhere. Very poor. Give me a break! Characters are show telling boring stories. Some of these characters are shown before the big reveal, a red herring. Editing is crap, real choppy. The scene where the main character is shown confessing to his wife about killing someone, and the wife's cousin casually walks in and he does not stop talking. Does this seem realistic? No! So, what we have here is someone who got a budget with no talent, and hired a bunch of people with no talent to produce a film, for all the no talent film viewers to see and say, "It's art". It's not art, it's crap.
Inferior story, acting, cinematography, lighting, sets, editing, music, you name it, it sucks.
I've watched enough giallo films and understand that not all the story is supposed to make sense. But at least the good ones present decent cinematography, acting and music. I recommend Don't Torture A Duckling by Fulci, or All the Colors of the Dark, by Sergio Martino This movie should be the basis of a semester in film studies. Scene by scene should be torn apart for what should not be done. To be fair there are some parts, like the park scene that had good ideas, but bad execution.
I've read some of the IMDb reviews and most like or love this movie. I hate it. And I hate Argento. This is only the 2nd movie I've seen from him. First was Suspira, a complete garbage of a movie. Color gels for lighting and that's his set design. I can only guess that fans of Argento might be looking at his movies and disregarding the story and the acting. And they praise the cinematography and scenes. Sorry, he fails on all fronts. He does not produce art, or abstract art, it's just garbage. If you watch a film with black screen and no audio, you would have a better time, use your imagination and produce your own abstract art film.
I've read most of the critic reviews. So far only Entertainment Maven and Bloodcapsules have given it a low or negative rating. So, I can only conclude that most reviewers here are deaf and blind and ignorant of true art. Most state that the story is lacking and the acting is amateurish, but disregard these important elements of movie making by giving it a positive review.
So, I guess you need to make up your own mind. Please, do not be fooled by garbage disguised as art.