Gaspard was a very kind/helpful host. The apartment was:
-One of the cleanest apartments I ever visited.
-Has a great location (close to a metro station, walking distance from Sacré-Cœur, great bars within a few walking minutes, Rue des Martyrs (a street filled with foodshops/delicacy shops) is also very very close)
-Is very quiet; although it is located in a very lively neighborhood it is located on a quiet street and the apartment is at the back, on a small courtyard)
-The bathroom is great, spacious and filled with natural light.

I would highly recommend this apartment. It's comparable with a suite in a 5 star hotel. My tip to guests of Gaspard is to visit the Rue des Martyrs and get some of the great foods and enjoy a picknick on the hill before Sacré-Cœur or having a luxurious breakfast in the apartment.