QuinnLwrote a review of Shimano Dura-Ace FD-R9100 11-Speed Front Derailleur on July 10, 2019
Familiarity: I've put it through the wringer
Quality of materials is in question. I have probably 2K miles on mine, and the metal plating has begun flaking off. Serious bummer Shimano! Not what I would expect from Dura-Ace, or any $100 front derailleur!