We were staying in this flat this July and we did't regret that we had chosen it! The flat is very beautiful and interesting with unique furniture and atmosphere. For those who apreciate arts , it is a perfect place!
The was everything you need and you can stay there with kids. During our staying we didn't have any problems. The metro station and supermarket is very close.

The only thing that you have to take into account is that the flat is not situated in the centre of Paris. Please mind it if you want to save money on metro. The centre is about 25-30 minutes walking.
Thank you Alexandre and all your famiy, especially Mitya! ;)