Well, John Buscema's art was nice and Tony DeZuniga's inks were very good - I suspect the Tribe were involved somehow. The story is a meh!
The Doc Savage books like the Shadow books are not very good. The characters themselves particularly the Shadow were never done justice in the books. The 70s comics versions of the characters simply aped the books so were never very good. The later comic book version of these characters are certainly a lot better.
Valerian says 6/10 but that's for the art.