Lovely spot, in a beautiful building with interior courtyard. Very quiet. The area is fantastic, walkable, and metros are close by to get you anywhere in Paris. The place is very clean. Felt at home once we walked in. Radiant heat keep the place very warm in the winter.
Leon was very responsive. Some lights were not working when we arrived, and he had them fixed the next morning.
The only real issue is the kitchen, and it's totally perplexing. No dish rags. No dish rack to dry. And when requested, Leon states that it is intentional. Why provide everything, yet ask guests to go and buy kitchen dish cloths? It's almost as if they do not want you to use the kitchen.
Otherwise, I do highly recommend and would come back here.