We had a wonderful time staying in Estelle's apartment! We were made very welcome and were well looked after - our hosts were great: very attentive to our (few) needs, happy to be flexible, and otherwise allowed us to be independent. The flat itself is gorgeous.
The area around is really fun - hip, diverse, interesting - with the Canal Saint Martin just a stone's throw away in one direction, and the Parc de Butte Chaumont close by in the other direction. And the view is just as stunning as promised. All in all, this place is thoroughly recommended!