Fantastic apartment for a group stay in central Paris. Franck made access and departure really easy and provided some very useful maps, information etc. The location - within close walking distance to the Bastille - is excellent.
We were a group of 8 and had plenty of room. If couples, you probably wouldn't want more than 10 in group (for each to get a double bed) but you could get a couple more in single beds.
Well-equipped kitchen and good bathrooms.
Only negative would be the residual (but strong) smell of cigarette smoke which might bother those sensitive to the smell.