What I liked most about this apartment, is that it actually is someone's home that you are staying in. There are a lot of houses on Airbnb that are owned by companies for the purpose of renting them out. This is not one of those - this is a very cosy and clever organized apartment owned by people that clearly love that place themselves. It made our stay in Paris feel at home instantly.
The other great thing is the area. I did not know Belleville before, but I would have loved to stay much, much longer.
You should know that there are no outside windows in the "master bedroom", so if you expect an airconditioned 5-star hotelroom kind of room, this may not be for you.