I had a lovely stay at Fabien's. His place is small but very well laid out, so it felt surprisingly spacious. The location is super convenient, one of the best spots to stay at when visiting Paris. It was also surprisingly quiet. The place was nice and clean, and the mattress was comfortable. It's a lived in apartment as opposed to a rental apartment as is often the case in Paris, so expect a few of Fabien's belonging here and there, although Fabien took care to store everything away before I arrived, and I didn't have any issues with that. I found the place to be a little warm and hard to get a good air flow since it only opens on one side, but again that's often unavoidable Paris for small apartments. Also keep in mind that the flat is up 2 flights of rather narrow stairs. I was aware of it, but was still a little surprised by the narrowness of the stairs. I had a large suitcase and managed to bring it up, but I could see this being a problem for some.
Fabien was a pleasure to deal with, super responsive, and very accommodating - he accepted request to adjust the check-in and checkout times which was a great help!