There are "horror movies," the sort of entertainment that since approximately 1973's The Exorcist relies more on in-your-face "Boo!" or "Ick!" moments than on subtly drilling a tendril into your brain to pick the lock on those primitive fears waiting...read the complete Night of the Demon (1957) review at DVD Journal
This is a case where the press materials are actually pretty right on. Sure there is a B-movie element to this (primarily in the somewhat rubbery demon monster), but the film does build tension quite well, and the acting makes it most watch-able....read the complete Night of the Demon (1957) review at Filmjudge DVD Review