I tend to have problems with many 70s Horror movies. I think this one got a little interesting the last 20 minutes - I'm not too sure because by the time it reached that moment I was asleep because it's extremely slow and uneventful till near the end. Yet, it's not the kind of slow that helps in creating suspense or tension, it's just not paced very well.

Manages to be quite creepy even though it is mostly shot in summer daylight. Nice misdirection, and a good eye for off-kilter framing.

Not all that interesting.