Coming back to this film after watching all the others, it's interesting to see how much of the series' formula it laid down even though it lacks the most famous element of the sequels.
Introducing Boris Karloff's character, Dr. Niemann, as a Nick Fury to the Monster Avengers makes sense in that they all needed to be revived in someway, but these films have never strictly adhered to logic or continuity. I feel like I would have rather watched a movie about Dracula using the two more mindless characters in his plans for a true crossover rather than all three being under-utilized in somebody else's story.
It's a monster movie done much in the style of cheap slashers that would dominate the following decade of hour. A cast full of young, sexual women is picked off in gory death scenes. I feel the movie does deserve some praise for having a full lizard suit and not relying entirely on shots of its hand creeping around doorways and slashing at characters. Even a terrible monster suit at least adds something to a generic movie.
My girlfriend and I both asked the same question when we learned that Rankin/Bass, the company behind many of the stop-motion Christmas specials, had made a film featuring the classic movie monsters: "Why isn't it shown every year on Halloween?" Mad Monster Party? provides many answers to that question.