Unlike a lot of the low budget fare made around the mid to late '70s, it still holds up pretty well to repeated viewings. This isn't a fantastic movie, but it is at least watchable and features a cast that can actually act. The inimitable John Saxon, star of many a western Stuart Whitman, and even Martin Landau (Post 'Space 1999' I think) make their appearences, supported by the likes of Tisa Farrow (Mia's sister) and TV queen Gail Hunnicut (Where is she these days?). One great element of this film is the execellent music composed by Armando Trovajoli. At times, he has included themes which are a combination of classical music, along with synthesizer riffs. And the heavy bass line help to hieghten tension during the scary scenes. As someone has mentioned before, this is a mix of genres from the Italian giallo, to the usual US cop thriller. But it all seems to work well.
Methinks the over-rated Dario Argento could learn a lot from a film such as this!