Isabelle's place is ideally located very close to the Notre-Dame Cathedral and the Saint-Michel station where Metro line 4 and RER train B and C are supposed to stop. However during our stay RER train C that goes to Versailles doesn't stop at St-Michel due to station renovation. My advice is to find out which station is closed when planning the day's itinerary before boarding the Metro. The apartment is super quiet. Here you get the best of both worlds: walking distance to the Notre-Dame and the Cluny Museum without the noise of a touristy area. The area feels very safe. By the way, the Cluny Museum was closed for renovations when we visited in March 2018. The apartment was cosy and more spacious than a lot of apartments in the Latin quarter. There were three of us. We appreciate the fact that there was a single bed for the third person and a separate sofa for us to sit on. When I booked the apartment I was fully aware of the fact that there is not a lot of natural light here. It didn't bother us. It is the lack of windows facing the street that contributes to the tranquility in the apartment. One nice surprise is the two skylights in the living room that bring in some natural light. One little drawback is the fact that the sewage/drainage system in the bathroom is quite loud. It might wake up some light sleeper sleeping in the living room. On the positive side, the shower is large and modern with good water pressure. Isabelle is very accommodating with our check-in time. We also like the fact that they use a lock box for the key. They always respond to our messages very promptly. We really enjoyed our stay. We would definitely recommend it.