The positives. Jean-Michel was a very good communicator and met us on the sidewalk for our check-in. He has obviously tried hard to make the most of a very confined space. The location is terrific. Because the room faces a rear courtyard, one doesn't hear the noise from a very lively street.
The negatives. I had read about the size of the place. But not until we got there and particularly after being there a day or so, did we start to feel very claustrophobic. The place is just so tiny and two people with a suitcase each make it awfully cramped. I think it would better suit a single traveler. The bed is a thin mattress on a platform that extends over the room. It was not comfortable. Finally, and maybe most importantly, I think the ladder that one must climb up to and down from the bed is borderline unsafe, particularly if one has to navigate it in the middle of the night for any reason--like use the bathroom. It is wobbly, even if it is placed in the two grooves that Jean-Michel has carved into the platform. I think that devising a way to hook the ladder onto the platform would make it safer.
I found Jean-Michel to be very likable. And I don't relish writing critical reviews, especially when I like the host. But I feel like the integrity of this site requires one's honest, even if subjective, opinions.