We stayed for two weeks and had a really nice time in the apartment with it's splendid view over Cassis and it's harbor. Well equipped kitchen. Walking distance to the city center with lots of restaurants (we can also recommend a visit to the Michelin two star restaurant Villa Madie), and easy to explore the surrounding cities and interesting places. You're in the middle of it all!
The only thing that wasn't so positive was the traffic noise from the road just below the apartment.