This is a great central location for visiting Paris. It is spacious and although very central in the St. Germain area, it was very quiet.
The hosts were very gracious and helpful, the communication was great.
The building also had a small theater and an art gallery for small events.
One important note, the building does not have an elevator and the apartment is on the top floor which means climbing 4-5 flight of stairs. The good is that you get your daily exercise but if you have mobility issues, are not in good shape or have large luggage, this will be challenging.
A nice bonus: you get a peek-a-boo view of the Eiffel Tower, specially nice at night.
We would definitely do this again.