We stayed for 5 weeks in this compact, well-appointed apartment in the best location in Paris. The building is secure and well-maintained (someone comes to sweep and mop the stairs and entryway twice a week).
The apartment is perfect! The kitchen has an induction cooktop and convection oven, dishwasher, microwave and fridge. The host left owner's manuals (in 4 languages!) for every appliance so we could figure out how they worked, and everything worked well. Our 'greeter' explained how to work the TV and washer. There is a really good drying rack in the apartment, or you can go around the corner to a laundromat to dry clothes.
The bed is truly a king and has a nice firm mattress. The host left us plenty of linens so we could change the bed and replace towels without having to launder them. Having an extra half bath made the long stay here even easier for two of us.
The fold out couch in the living room is comfortable (our daughters used it once), but the space is really cramped for more than 2 people. The apartment is heated (we never needed to use it) but not air-conditioned. This might be a problem in really hot weather.
The host expects that you clean the apartment upon leaving or pay an additional 90 euros to have it cleaned.
The neighborhood is wonderful! Lively with plenty of shops and restaurants nearby, and very close to the St Paul Metro. This street is surprisingly quiet at night so, when the weather was good, we could even sleep with the windows open.