Perfect stay in Paris!
The flat is perfectly located, in an old, typical building central in Montmartre but not in the most turistic streets (and that means that you can sleep well at night because it is very quiet). The area is enchanting, and full of restaurants, cafés, brasseries and close to the metro stations Abbesses and Blanche.
Boris is very kink and always ready to answer to any question.
The room was tidy and clean and, even if it is quite small, it has everything you need for a relaxing stay (the bathroom in particular is very small but there are shower, wc and sink... so you've got all the essential). Consider that the flat it is on the fourth floor without elevator, so avoid bringing heavy luggages.

I think I will choose again this house next time I will go to Paris!