My stay at Quentin's apartment was wonderful! It is beautiful inside, the room was large with a bathroom beside it, a spacious closet with hangers, a desk, and plenty of lighting.
I had a little trouble getting in the first time, which was my own fault (no food and 1 hour of sleep will make you a little less than organized), but once I was in, coming and going was easy!
It's also located in a great area, the metro is super close, there's a grocery store beside, and a small crêperie across the street.
The next time I come to Paris, there's no question of where I'd like to stay again. :)