First thing's first - this is a very low-quality transfer that I watched. I've heard better quality versions of this film exists, though they're in French without subtitles. Shrugs. So this is a pretty bad print, and if you've seen the most common version of Cathy's Curse out there (one released on Mill Creek Entertainment's Creepy Classics), I'm sure you'd agree.
In a way, though, I think it brings the movie additional charm. I've never been to a drive-in, but I can imagine this is the exact type of movie that would be great to watch at one, and while the quality has faltered, it's a pretty fun romp.
Cathy's Curse is one-part The Bad Seed, one-part Burnt Offerings, and one-part The Omen - in it, a little girl is possessed by her father's deceased sister, and one by one, people around her start dying or going mad. All things considered, it's a pretty simple film.
Three things about it stand out, though: Firstly, the music has a charming quality to it. Sometimes eerie, sometimes not, the music stood out and enhanced some of the scenes. The acting too was noticeable. It wasn't always great - Beverly Murray sometimes went a bit overboard portraying the panic-stricken mother. But both Alan Scarfe and Roy Witham did pretty decent jobs (despite Witham only having been in three other films). And lastly, you had some occasionally creepy scenes (along with, of course, some rather ridiculous scenes, but that's half the fun).
Some of the quotes are pretty classy too - at the beginning, a father tells her daughter "Your mother's a bitch - she'll pay for what she did to you." About halfway through the film, a drunk Roy Witham (playing the groundskeeper as a kindly older man) and gleeful Cathy scare a medium away from the house, shouting, "Get out you old bitch," and calling her a "fat dried-up whore." The delivery of these lines were excellent, in my ever-humble opinion.
Cathy's Curse can at times be a bit of a mess, that much I can say. But I did enjoy it more this time around as opposed to the first time I saw the film, and really, it's not all that terrible. It doesn't really drag on, it's amusing, and is definitely 70's - what more could you want?