The apartment is very beautiful and in a nice area of Paris. It is on the top floor and the view from the balcony is extraordinary. The hosts are very communicative and help you out a lot.
The only reason I do not give 5 stars is my particular check-in procedure. I arrived late in the evening and there was no possiblity to get a self check-in, which meant I had to pay 40€ for a person to bring the key at my time of arrival.
Despite this unexpected fee, I enjoyed the stay a lot and can really recommend the apartment.