The apartments worked well for our group of 10 adults. The host was communicative and professional and the space was as described, well appointed and comfortable. I would highly recommend for a group, although the smallest bedroom was tight for two adults (better for one adult or one or two children). Additionally, one bedroom was up a narrow spiral staircase and the nearest toilet was back down the staircase, which might not be convenient for all guests. The apartments are up several flights of stairs, and the building does not have an elevator.
The location is fabulous and living and dining spaces comfortable and well decorated. A wonderful way to experience Paris with a group.