We stayed at Heidi's apartment for ten nights in early Fall, just as the tourist season was coming to a close (a great time to visit Provence). Not only was it spotless and appointed with everything one could ask (dishes, glassware, guidebooks, linens, good lighting, comfortable furniture) but it was the most tasteful decoration I've seen in a rental, a lovely mix of art deco and contemporary design. The location is absolutely perfect, located on one of the nicest old squares in the historic part of town but set back through a quite courtyard. The square is filled with restaurants (I recommend Just En Face) and the very next square over, just steps away, is a small, picturesque daily farmer's market that expands to a full-range market twice a week. You can get up in the morning, collect croissants and fresh fruit and cheese, and head back home for a sumptuous breakfast. There is a reasonably priced city parking garage a few blocks away, with a terrific butcher shop on the way there (they must have had ten kids of pate). There's also a nearby store, just outside the historic district, that sells nothing but frozen foods with every imaginable French specialty-- kind of fun to experiment with if you want to eat in. Heidi was a gracious host and answered all our questions, and had many good recommendations for us. Music lovers: check out the Conservatoire Darius Milhaud and see about free or modestly priced concerts at their beautiful concert hall, within walking distance.
I can't imagine wanting to stay anywhere else if we return to Aix.