I'm a fan of B-Movies and it did not look interesting to me at all.
Honestly, you didn't miss anything. Old B-movies are my comfort food, but even I almost gave up on it. It's slow, convoluted, and padded out with repetitive dream sequences and flashbacks. The earlier versions (with Lugosi and Karl Malden, respectively) are much better.
As for the upcoming stuff, I can't recommend THE BODY SNATCHER highly enough. Probably Karloff's best performance, aside from maybe FRANKENSTEIN and THE BRIDE OF FRANKENSTEIN. Lugosi's part is much smaller by comparison, but he and Karloff have one great scene together.
More trivia: the movie is directed by Robert Wise, whom, of course, went on to direct such films as THE DAY THE EARTH STOOD STILL, THE ANDROMEDA STRAIN, THE HAUNTING, and STAR TREK: THE MOTION PICTURE. (Not to mention THE SOUND OF MUSIC and WEST SIDE STORY!)