Coline was a great host: she tried to make our staying there as comfortable as possible and she was very understanding of our needs (e.g. she let us keep the baggages at her place until we took our plane in the evening). The house is kind of big for parisian standards, even though the bathroom doesn't have that much room. The place is close to the station Charonne (line 9), from which you get easily to Nation (line 1): from there you can reach the center.