This 5th floor flat is amazing! The location is perfect and the place has a tiny clothes washer and dryer so you don't have to go home with a bunch of dirty clothes. Straight across the street is a casual Parisian restaurant with friendly wait staff and fabulous food. There are a lot of cafes, creperies, shops and little markets within walking distance. You can hear the bells ringing hourly from Notre Dame cathedral!
John personally let us in and showed us how everything worked. He also gave tips on where to go and responded to questions when we had them.
Downsides: no lift, so you climb 5 flights of stairs (108 steps, to be exact) and a lot of street noise, so pack earplugs.
We would definitely stay here again!