The appartement is indeed a bit small, even for two people with luggage for a france-round-trip, but it worked. It has a very charming decoration and is conveniently furnished.
It is well situated within walking distance to the metro 11 and with some neat restaurants near to it.
On the downside: It was a bit cold and there was no possibility to heat, besides a tiny electric heater in the bathroom.

Charlotte's father, who hosted us, was very kind and provided many tips for our stay.