I just stumbled across a copy of this film recently on DVD, and consider it a very good find.
Since a kid, I've had a (somewhat) continuing fascination with Bigfoot, Sasquatch, the Abominable Snowman, etc. However, this is the first time I've come across a film that treats the subject intelligently, and with more thought than just providing a simple scare. This film was well acted, written (intelligently so) and directed, and created a genuine sense of suspense, and maintained an eerie mood throughout. You don't see the creatures full-on, but that's to the film's benefit and better over-all effect to those watching, especially in the almost film noir use of black and white photography.
This is no cheap monster quickie, or faux documentary (though I like some of those too), and though fairly low budget, it's still good.
So basically, I'd have to say this is the best film about the Abominable Snowman (or Bigfoot-like creature) I've seen. Like the Yeti...seek it out!