We stayed as a family of 5 for four days in Roselyne's flat. It was a lovely flat, beautifully decorated and furnished and well-equipped.
While we did not meet Roselyne, all the practical arrangements and welcome were done by email and by Riza very effectively.
The flat is really well-located in a lovely calm part of central Paris while being close to Champs-Elysees. There are plenty of good restaurants, food shops and other shops nearby.
We would heartily recommend it as a base for spending some time in Paris.