For the clothing, etc.
I wouldn't do too much with in game benefits, with the possible exception of calling it a set of masterwork tools for diplomacy, bluff, innuendo or other appropriate skill use. Maybe even intimidate, if it were the right cut or style....
I like the unseen servant ring. Very nifty. Include also a mending ring with a number of daily charges. The clean cantrip is gone, but that would have made a good necklace as well (and take care of those pesky "red wine" incidents).
You could stack those on an item of clothing, but really it only keeps that item clean and neat. Ring is cooler, works on everything (but takes the covetted spot). In one campaign I made a "robe of the alchemist" which basically was a nice set of robes and a number of daily clean and mending uses, as well as some holding properties. Oh yeah, since all alchemists are absent-minded, it also had some locate object functions (but these only worked on misplaced items by the wearer - it couldn't find anyone ELSES things...."now where did I put that beaker....?")