We thought it was wonderful -- it was very comfortable and spacious, and we had 7 adults! It is well-situated, a long but manageable walk to Notre Dame, but very close to RER which was easier to use than we had expected. There is a supermarket one half block away which had a broad selection. There were also brasseries and bakeries slightly further away but close enough for a short walk. The host was very responsive and prompt and was flexible about check-in and check-out time. The beds were very comfortable. Bathrooms were very nice. As others have noted, you can hear the RER trains but that was not really an issue for any of us. It felt very safe; it is located inside a courtyard that has a locking outer door.