I had a very comfortable two-week stay at Olivier's place. The room was not facing to the main street which was great when I wanted to sleep in. Room was quite spacious and pleasantly decorated. (Exactly as in posted pictures) It was very clean.
I think the location of the apartment can't be any better. Major places are in walking distance and metro is literally 2min away (hôtel de ville). If you are really fussy about stairs, you have to be aware that you need to climb up two levels of stairs.
Olivier and Matou (and Fibie :) are wonderful hosts and company; they were very helpful. One day before I arrived I realized that I was flying overnight and was going to be in the plane the first night; they kindly changed the dates last minute. I definitely recommend Olivier's place.