I stayed for 7 days in this single, private room. Balcony is cute. Heater kept me warm on winter nights. If you have a lot of luggage, keep in mind that this building only has stairs and this flat is on the 5th floor ((I had one carry on, so I was fine)). Building is located near some cute shops and dining places. Short walk from Jules Joffrin metro.
I would definitely stay again :D