I stayed at this apartment for one week while visiting Paris for work. The location was very quiet, and I was able to work at the desk during the day when I needed to. The wifi was sometimes worse than I would have liked, but this would not be an issue if I had not been working. Buttes aux Cailles is a great little neighborhood. There are two excellent Boulangers within a 3 min walk of the apartment, plus nice bars and restaurants. There is an amazing market on Sunday morning (roughly 9am-1pm) on the main road. The hosts were wonderful and communicated very well. There are very good transport connections from Denfert Rochereau. Overall it was exactly what I wanted, and perfect.