Being a music bod, I think you'd probably like it just for the haunting opening theme Aaryk, played over some nicely done credits. Must say that I love it - and a nice juxtaposition with the genre, I always thought. (Marc Wilkinson, composer IIRC).
The film itself is recommended as it's somewhat close to that WITCHFINDER GENERAL feel, and certainly has a particular atmosphere. Also, it boasts the presence of the late, great Patrick Wymark; always worth watching.
I always thought this one had an unusual slant, at a time when most of the competition were happy to regurgitate the Hammer Horror format. I'd go for it if I were you...
Smudge