Youtube has it online in pieces. Part 1:
part 2, part 3, part 4, part 5, part 6, part 7 (starting at about 3:06 in part 7 and continuing into part 8 is a scene with Vincent Price fencing saber), part 8, part 9, part 10, part 11
It gets a 95% fresh rating at Rotten Tomatoes. Moria has a review. 1000 Misspent Hours says,
it was the most perfect imaginable premise for a Vincent Price movie, and it’s no wonder that Price himself reportedly regarded it as his favorite among the films in which he appeared.