Teen books aren't my usual cup of tea, but this was a pleasant change of pace from recent readings. No one is murdered or abducted by a crazed gorilla (although a gorilla is mentioned in one story).
The stories are pleasant. I got a few laughs here and there. I like Go Go better than Animal because dumb characters get old quickly. I do notice that Animal's intelligence changes depending on the needs of the story. Since I never read these when I was part of the target audience, I find myself wondering whether kids reading the book were put off when the writers took swipes at rock music and modern dancing. That sort of thing popped up in Archie stories I've read, especially those from the sixties. The comics were sympathetic to young people but you never forgot they were written by adults (wasn't the mambo craze in the late 1940s and early 1950s?).
The artwork is hard to critique fairly because it's so obviously Archie-inspired. Apparently this is because Archie artists were responsible for it. I notice that in a couple of stories Go Go is a bit off-model. Animal also changes appearance. Nothing dramatic. Oh, and there are some nice cars, too.
Odd bits: several stories are lettered by a guy with a very distinctive style whose name I've never discovered. He lettered many of the THUNDER Agents and Undersea Agent stories. His exclamation marks are always a giveaway. He also has the habit of italicizing character names: "Hello, Animal, come on in!" Which makes me think of how DC always used to put a hero's name in boldface. ("Where do you suppose Superman disappeared to?") That really annoyed me when I was a kid. I read hearing the words in my head, and assumed boldface words were emphasized. It tripped me up when the context didn't call for emphasis: "I'm going to look for Superman next door." Another "Who cares" moment from yours truly.
About the Archie style. Many years ago I happened to talk to the Archie editor (don't recall his name) and he asked if I'd like to submit sample pages. I admitted to a very narrow stylistic range and politely declined. I wonder what would have happened if I'd tried and (highly unlikely) got work. Anyway, I was more familiar with the Archie newspaper strip than the comic books and mentioned using Bob Montana as a model. He said that while Montana designed the original characters, the modern "Archie Style" was developed by Dan DeCarlo, and it was DeCarlo to whom he pointed prospective Archie artists. Isn't it interesting how influential that style was? Say "teen mag" and that's the style that pops into your head.