I think the bib gourmand is the hidden star of the Michelin guide. It is just good food at a good price and it is much less known so you don't have to deal with the throngs that stars attract. It is more extensive too so there are always options.
+1 to this, if youre visiting paris just follow bib gourmand places and avoid the reservation anxiety. I had the best duck udon Ive ever tasted at Kisin