We went there last year with my sprightly octoganerian mother in law. Despite the temperature of over 30 deg, we all enjoyed the walk from the station, it's level and interesting. One of those cases on wheel makes life easier of course.
Having looked into various restaurants, their menus and what we could see on the plates, we all enjoyed a simple meal in the highly touristy Grande Place, and were very happy with the meal, the service, the price and the view.
Have a great time whereever you eat, Bruges is a lovely place. Returning to real life later from a place so polished and sanitised is a bit of a shock though!