|Our heroes are attacked by a space-frog while climbing a spider web inside a mountain. Yes, it makes no sense.|
I picked it at random from the several issues available. Is the plot original? No. Are the characters vivid, dynamic and engaging? No. Does the dialogue crackle and sparkle? No. It's also a good thing the Martian sidekick was an alien and not a Terrestrial, because his dialogue would be excoriated today for its stereotyped pidgin English. Was the conclusion dramatic and satisfying? Not really.
So why was it a fun story? Because it was a great setting, and just the sort of planet that could and should appear in Traveller.