This is one of the three pictures Abbott and Costello made for MGM-- who proved with Buster Keaton, the Marx Brothers films after "A Day At the Races and Laurel and Hardy's late releases," that they really don't have much of a "touch" for this kind of comedy. Abbott and Costello fared much better at Universal with films such as "Hold That Ghost," "Buck Privates," "Who Done It?" "Abbott and Costello Meet Frankenstein," "The Time of Their Lives," etc. That's not to say that the film is terrible, it just suffers from sloppy pacing, almost no story, and somewhat weaker material for A&C (which was much sharper in the Universal films).
It definitely has its funny points, but it doesn't hold together very well as a complete film. Best to stick to the Universal's--- especially if you are a first time viewer of Abbott and Costello.