This was our first trip to Paris, so a lot of mandatory spots on our list. It was almost a marathon of a vacation with around 24 km in the first day of which 10 in the Louvre museum (I say this to give a sense of the priorities we had) We didn't spend too much time inside, we were away most of the days from 8 am to 11 pm with some recharge break in the middle of the day if we got too tired.
So, the apartment was all that we were hoping when we planed the trip.
In walking distance of all major sites, comfortable and warm bed, nice and clean bathroom and kitchen. Also quite spacious and relaxing living-room. We even zapped through the tv channels while resting our feet one afternoon and made a reservation and checked some larger map on the mini-laptop when our phones were dead. And breakfast and coffee provided by the host. Very nice!
Also, the access from the airport was very easy (RER to Châtelet-les-Halles) and we came out within 20 meters from the entrance in the building.
Also, for emergency basic groceries there's a store right around the corner, visible from the metro exit.
And the host of course, very punctual and welcoming and responsive during the day, when we had some questions. Good mood and attitude to set the tempo.
We were there 4 nights, but the apartment is equipped for longer staying as well, with the possibility of cooking- there's stove and oven and all sorts of pots and also the possibility to do laundry.
Overall great experience! Hope to revisit at some point :)