This episode stands out from earlier ones with its more interesting visual style.Shots were composed of more interesting angles. The monster has a fun design w/ its vacuum cleaner tongue for sucking up pearls. Also, the opening and ending give a feel for swinging 60s Tokyo.
This episode was also the first episode to streamline the basic series formula. Instead of going through the whole set-up of monster origin, science patrol investigation, etc. This episode moves right to monster action after a short prelude.
There is some goofy stuff about women and their love of pearls, but that adds to the period charm. There is no reason to get offended over Ultraman . . .