This apartment is beautiful! Wooden beams in the ceiling, well decorated and a good use of the space to comfortably fit 15 people. There are 5 double bedrooms split between 2 apartments on the first floor. Some beds need to be crawled onto from the bottom as they span to each wall but this is not an issue at all! The two double sofa beds were very comfortable, quite firm but that’s what I like. There are 3 communal areas - one in each apartment (which are connected by a corridor) and then in the basement there is a large kitchen with 2 showers and a w.c. behind it and with a large dining room for 15 with a shower and w.c. separate at the back. The location is perfect - a few minutes walk from St Michel Notre Dame station (direct connection to CDG airport on the RER B line), right by Notre Dame and the Seine.
I had the best weekend there with 14 of my friends. Would definitely recommend staying!