It was probably the best movie Abbott and castello made together.
Agree, but love all their movies. And if my trivia is correct, Glenn Strange, the monster, was in later life, Sam the Bartender on Gunsmoke. Vincent Price was fun too as the voice of the Invisible Man in the last scene. Also, this is supposedly the last movie where Bella Lugosi turned in a strong performance. I believe he had a dependence on morphine due to an injury?
Another fun monster flick of Abbott & Costello’s was Meet Dr. Jekyll and Mr. Hyde with Boris Karloff.