We just spent a full week in Lilly's place. This is my 3rd AirBNB in Paris this fall, depending on the size of our group.
We loved the location, close to the circle of cafes in the Latin Quarter, around the corner from the Pantheon, and a few short steps to the metro at Place Monge. The private street made things very quiet and restful.
It was a nice size unit for 4 people in the 2 bedrooms. The twin bedroom walls thru the larger queen-sized bed, which was fine for us in terms of privacy, but the wood floors are REALLY squeaky. We weren't disturbed by the apt above us, if they have the same problem, but there was no quietly getting thru the bedroom without waking the others up.
We didn't need to use the pull-out sofa in the living room for sleeping so it was nice to have these areas free for watching TV. Being able to access Netflix was great for late evening time. The extra comforters were needed in this room since there were no heat controls, but it was a very pretty and pleasant space.
Kitchen was great with functional washer/dryer, plus a towel warmer rack in the bathroom which helped dry clothes. Coffee pods and detergent were great amenities, even though we bought more for our use over the week.
The bathroom was a surprise with the toilet in a large "closet", elevated up 3 stairs, and the sink/tub across the hall. With only a hand-held sprayer and no hook, it was not a very comfortable shower and tricky to accomplish decent hair washing.
A main concern, especially for guests wanting to have some freedom of coming/going, was trying to coordinate with 1 set of keys to the main building entry and the apartment. The tricky part (and potentially dangerous) is when we would find the front building entry door double-locked from the inside. We couldn't get out of the building without a special key. If we left at separate time, this required us to make sure we didnt leave each other "trapped" in the building, between the self-locking apartment door and the dead-bolted from building door. Safety-wise, this would never be allowed in the US.
It's still a great value for 4 people over trying to rent a hotel, and it allowed us comfortable, relaxed time together when we weren't out exploring Paris. Hope this helps.