My first exposure to Godzilla, like many American children of the 1970's, was this animated series. Even though it was strangely out-of-sync with all that I came to know about Godzilla, and more akin to Jonny Quest in style, my epiphany went something like this: I was five years old; I woke up one Saturday morning, went downstairs to the typical 1970's behemoth, wood-paneled color television, and positioned myself in front of it, only to find (after it warmed up) the "Calico Clones" episode....yes, this was Godzilla, I knew about him! I used to go to a friend's house around that time and we would battle giant Shogun Warriors! This was the same Godzilla! It was one of those moments that you remember forever, and I still love this series. Yes, it exists in its own unique universe and style, but I have made it a point to begin my own Children's indoctrination with it, and they have all loved it.
EDIT: By the way, Sony/Classic Media...will you PLEASE release the second season of this series on DVD? Ok, if you did a boxed set of the whole show, I would re-buy it...but don't tell anybody!