I give this a solid 7. Didn't see the film until it was released on BLURAY.
The print I saw was excellent, with decent sound.
I have read various reviews all over the place.
For a movie supposedly made for $200,000 USD 1971 ($1,238,814.07 today)
it is a stellar showcase of both creativity and using well held traditional
production techniques, mixed in with really off the wall but effective
tricks, some taken from other movies, some movies taken from this.
The sound effects aren't as cheesy in most cases as I assumed since taken from
older libraries, the crickets loop at the start were probably the most heard effect ever, have heard that in TV shows, movies and cartoons.
The opening title , credits is a classic gothic german font, kinda cool.
I was unfamiliar with Wranger Jane, but knowing the story of her career, this
appears to be a bad turn in her history, degraded her. She is a presence on screen, but no match for someone like Vic Tayback (Calvin).
The lighting at times is very flattering to her, and sometimes terrible.
Her character's (Ellie Masters) entire back story is basically tragedy.
I was surprised again with some production details like quality , but basic camera work, showing they probably hired union guys who have done a million TV shows. This does not look rookie, just lower budget.
The actors chosen are great and are what hold this interesting 'prototype' slasher film together, but I find it more psychological than slasher.