Let me start with the one area where there is room for improvement. When travelling having access to wifi is imperative and the wifi was so slow and weak as to be non-existent. This was especially an issue because we were travelling with children, who all had devices and if more than about two people were using the wifi it became slow, unresponsive and difficult. Since I booked this place online it stands to reason that I would need to access other online bookings during my time, which was made much more difficult by the super slow wifi.
With that sole frustration out of the way, the place was AMAZING. We rented the whole home and had 15 people, including children, there. There was enough space although some of the kids slept on couches in less than private areas. A couple of the bedrooms did not have windows, which made them a little stuffy, but all had fans. The bathrooms downstairs had enough showers that our party could all get cleaned up in the evenings or the morning without causing delay and backlogs. I really don't know how the kitchen facilities were because we ate out all the time and only used the mini-refrigerators for chilling water for the next day.
The location was fantastic. Our party had never been to Paris and between the great (if touristy) atmosphere in the streets near the home with restaurants and a vibrant feel late into the night and the proximity to one of Paris's major landmarks and the super close access to the Metro (the trip to the airport on the Metro could not have been much easier), the apartment had really everything we could have asked for. I can't really comment on how it would work if you only had half the place although it seems like you might have some space that you shared with the occupants of the other half (a hallway downstairs to where each unit would have a separate kitchen/bathroom suite). But as one giant unit it worked surprisingly well especially for a big group. Hosts were responsive, although we really didn't interact with them much beyond simply getting access. We really enjoyed everything about our stay!