This one's a winner. Clean, and the host was responsive and helpful. The location is a bit away from the really touristy area (closer to the Seine) but a short walk, bus ride or metro ride (2 stops) to there. The rest of Paris is easily accessible from there (it is a small city, relatively speaking).
The apartment also has a large balcony that overlooks the courtyard, not the street side. We didn't use it much as we were in the cold season, but it was pleasant for a quick stretch, nonetheless.
The kitchen is small but is fully functional and has everything you need should you elect to cook at home. There is a convenient food shop up the street.
We found the bed to be quite comfortable.
Quiet, residential area but with plenty of restaurants. In particular, we would strongly recommend the two adjacent Persian restaurants one street over. Across the street from them is also an excellent small Tibetan restaurant (rue st. Jacques, near the church).