We are very happy with our stay here and got to see a bit of the local, non-touristy side of Paris. While a little small the apartment made good use of its space: the beds were comfortable, the kitchen and washer/dryer (although a little confusing to figure out) were useful and we felt at home. There were plenty of cable channels to watch and the library of books on the shelves was cool (he even had some on Basquiat!). There was also a record player, which is unique to find. While the place could be a little cleaner and more well-stocked, the only issue we had was with water getting all over the floor when showering, but that is typical in european bathrooms.
The location was perfect, at most a 35 minute train ride to attractions and the 15 minute walk to sacre cœur was gorgeous. There is also a bakery and grocery store nearby.
Damien was the perfect host, friendly and attentive, and I would highly recommend his place to stay!