Great place with a perfect location. It was quiet at night and quite comfortable. The living room is also wonderful. Not a bad place to hang out and have a drink in the evening.
Michel gave us a nice introduction and was easily reachable.
It is true that the stairs are not for people with any sort of mobility problems. They are narrow and there are lots of them. The building is narrow and deep - charmingly so, in my opinion.
The antique furniture gave the place a unique feel. Certainly one of the most unique appartments I have stayed in.
Some basics in the kitchen weren't available. The only knife for cutting was dull and I do not think there were any simple bowls. Hence, maybe not the best place to stay if you plan on cooking your meals.