Michael Landon, contrary to what some believe, never downplayed his connection to this film for it gave him his start in show business. He may at first have had doubts about being connected with it with the initial uproar, which is why he turned down the chance to play the werewolf a second time, but after that, he never bad-mouthed the film. In fact, he paid homage to it on a Halloween episode of "Highway to Heaven."
Anyway, the acting is good all around with standout performances by Landon and Whit Bissell. The "science" used to turn Tony into the monster may be silly today, but in the 1950's, there were a lot of talk and film plots about past-life regression following the Bridey Murphy newspaper accounts (also used in THE SHE-CREATURE). Again you had to live in the 1950's to understand all this. Philip Scheer's werewolf makeup is one of the better pre-Howling/American Werewolf ones in movie history and while the transformation scene isn't as good as in THE WOLF MAN or THE WEREWOLF, the director did not have a lot of money or time to work with and did a good job considering.
A film has to be pretty good, even with a low budget, to be as successful as this one was...and to remain a cult favorite 45 years later. It has stood the test of time and deserves to be considered a classic of its kind.