The Vampire is further enhanced by the acting, especially veteran character actor Dabbs Greer [Invasion of the Body Snatchers, THe Green Mile] as Dr. Beaumont. The rest of the cast is solid as well and do some nice ensemble acting.
The only drawback to this film is when we actually see the vampire creature. The make up may be typical of B-grade 1950's movies but it's so bad that it takes the power away from the story. Nothing menacing here. Anyone these days could produce the same effect with a trip to the Halloween Superstore.
So, take it for what it's worth. If you're a fan of vampires this one should be watched because of it's originality. If you're a casual fan of the sub-genre, you can probably skip this one altogether.
For more info check out the film's entry in IMDB.