Very beautiful and spacious apartment in a convenient location. We were 6 Persons in 3 separate bedrooms and enjoyed plenty of room and privacy, the children loved the hammock and babyfoot.
Only downside is a large buildingsite just outside that gets quite noisy at times during the day - Frédéric says the noise varies, we might have just been unlucky. It doesn't seem to be gone anytime soon - until then I would recommend to spend your days mostly outside exploring Paris, to put on some good music while in the apartment and to bring earplugs if you want to sleep in.