That is definitely a well hidden gem that needs more recognition. No idea why it has such a low rating. It surely is better than many much bigger names in the genre.
I found this movie purely on accident while i was looking for Black Rain. But it cought my eye, even as i had low expectations for it. Boy, i was i wrong. It's a B-movie that can challenge many of the "top horror classics".
The movie has decent script. Not overly complex, but not flat and dumb. Leaning more towards typical thriller script. While it's kinda predictable, the movie manages to actually deliver very good suspense that escalates and intensifies towards the end. Which is something i actually see very rarely in the genre (and i've seen almost 1400 horror/thriller movies so far).
Cinematography was good at times even more than that. Acting was to my pure delight - spectacular for such movie. The main actress in particular delivers great sene near the end, with one of the best scream/screeches i've heard in the old horror movies. Easily stealing the scream title from much more popular actresses' performance. Her character is well written, has good arch, and it even has interesting twist that kinda caught me off guard. Nothing mindblowing, but nice touch.
Overall , highly recommended. It exceeded my low expectations , so it's between 6 and 7 in my books.