Vance's first novel, TFGB was first serialized in the 40s and published as a book in 1950. Pretty typical pulp space opera, meaning Vance employed the going tropes of the day. While it has an interesting premise, the two lead characters (and their cheesy romance) really drag the story down. Further, although there are some tantalizing hints of what would make Vance so excellent, such as his innovative world building and socioeconomic analyses, these serve primarily as window dressing here.
Paddy Blackthorn, our main protagonist, is stereotypically Irish, complete with accent and all (never mind that the time frame is several centuries from now). Humans have settled the universe to a degree, thanks to finally finding a FTL drive. The inventor the drive gave each of his five sons pieces of the engineering aspects of the drive and they still have monopoly control over space drives. Whether it is due to genetic tinkering, or human adaptability, the human race has radically diverged from the native stock. Each of the five sons settled a different planet and as a result, they can scarcely be called human anymore (although they still can breed with other 'races').
Paddy, charged with death for a crime in the opening pages (trying to steal a space drive) gets 'employed' to be a translator for the annual meeting of the decedents of the five sons due to his linguistic skills (and that they have to kill the translator after the even to keep meeting's secrets). Miraculously, Paddy survives the meeting and kills all five decedents and takes their 'gold bands' (hence the title) and escapes. Within the bands Paddy hopes to find the secrets of the FTL drive, but what he finds instead are a series of clues that hopefully lead to the actual secrets. Paddy teams up with Fay, an Earth secret agent, on an outlaw world and the quest begins...
So, on the one hand, TFGB is 'classic' quest novel set in space featuring a slick con-man and a top spy from Earth, intending to find the secrets of the drive and give them to Earth (now largely a backwater). On the other hand, this is a cheesy romance novel between Paddy and Fay. Lots of stereotypes involved to be sure and the sensibilities of the 40s make them selves felt to a crushing degree.
I might recommend this to die-hard Vance fans and those who want to complete his opus, but definitely not a good place to start on Vance. It is pretty amazing to read this after other excellent stories Vance told in his later career-- he sure came a long way! 2 meh stars.