I'm visiting Hong Kong from the US in January. I'm taking my father and my aunt (who lives in Hong Kong) to lunch at Caprice at the Four Seasons Hotel. It is a 3 Michelin-star rated restaurant. I know the custom in Hong Kong is not to tip (or just to round up), but when you're eating at a fancy French restaurant run out of an Canadian-based hotel chain… do you tip? How much?
In the US I generally tip 15% for decent service, 20% for good service, and 25%+ for exceptional service.