Pauline is a lovely friendly and helpful host. She makes you feel very welcome and always responds fast if you have any questions. Her flat is petite and does have many personal things of hers around, but it is cosy and clean. You feel as though you literally are her guest as a friend and it makes you want to respect her home very much. The best aspects are the bed which is very comfortable and the flat is SO quiet, which in Paris is an amazing and rare thing.
It is conveniently located on the left bank (southern side of Paris) for the RER and the Denfert Rochereau transport interchange (all stations and airports and taxis convenient to access). On the downside, the area is not the best - you are experiencing real Paris living, which is a little edgy at moments, and while there are vibrant market areas nearby, it's not so easy to find all amenities that you can rely on. There is a decent supermarket pretty much opposite, which is very helpful and a good bakery down the street. Finding somewhere local to eat is not as easy perhaps as elsewhere in Paris.
If you are older or have heavy or bulky luggage, the four flights of stairs up are narrow, steep and twisty - but you do feel as though you are in a French 19th century novel, which is a romantic plus - and you get fit!
Overall, staying at Pauline's cosy flat is a nice experience if you want to feel as though you are a real resident of Paris for a few days. Thank you Pauline!