My friend and I had a very nice stay at Sandra's place! The room is beautifully decorated and definitely big enough to fit your luggage and move around. She also provided towels and some empty shelves for our stuff. The living room is a nice and bright space and the cat is a big plus, he's really soft and loves to be pet.
The bathroom is a very small space, but since we aren't big people it didn't bother us. We never used the kitchen (except for the fridge and the sink) but it's also not that big, as you could expect from a Parisian apartment.
The location was perfect for us. The apartment is at a walking distance from Canal St. Martin and several metro lines. It's only a fifteen minute walk from Parc des Buttes-Chaumont!
Overall we had a lovely stay, it was perfect for our four-day city trip.