We've stayed at Jonathan's and Sarah's place for a month. The place is beautifully designed and the location is very lively.
There was a lockdown in Paris and whenever we wanted to buy something, the furthest we needed to go was about 200 meters. Bakery with the best baguettes and croissants next door on one side (believe us, we've made proper research), excellent cheese shop on the other side, and really good wine shop just across the street. Only a few more steps to get to a great beer shop as well. There are two bio stores in the street and also a couple of regular supermarkets. It's just behind the Canal St. Martin so, during no-covid times, there are dozens of restaurants and bars to go to. Sarah is happy to share their favorites.
There's plenty of storage in the bedroom. The kitchen equipment is basic but you will find all the necessary stuff. The mattress is comfortable for a long stay. Wi-Fi is strong and stable. The flat is warm in winter (it's nice to have slippers though).
The only downside is that whenever you want to get some fresh air, you actually need to open the door to the courtyard and there are no windows in the bedroom. Also, there is a noisy ventilation system between the bathroom and living room every day for about seven hours (during the day). It's nothing horrible, but it can get pretty annoying.