The house was very clean, you have enough toilets and bathrooms for big groups. It is a very convenient location in Paris, everything is very reachable by foot.
For the sleep situation, there were a lot of positive aspects, but unfortunately the mattresses are not comfortable:
+there were enough rooms for everyone so that not many people had to share beds in one room
+in each room it was possible to close curtains that also covered the light
+it is in a quiet street, so not a lot of noise from the street
-unfortunately the mattresses were quite worn out, so when you share the bed with another person, it was not comfortable to sleep in, as you rolled automatically in the middle of the mattress.
If the Owner would change the mattresses, it would be a perfect Airbnb :)