I've spent 4 days with my girl-friend in Paris staying at Nicolas's apartment.
We have very much appreciated Nicolas's warm welcome, help with our luggage and his recommendations from insider of nice places to eat and go out. For us it was not a problem at all to get to the apartment on the 6th floor without elevator. We have enjoyed our stay at the area where and how real Parisians live and it was a pleasure to spend some time just sitting by the window and looking out at Montmartre.
There is everything you need in the apt. We just lacked a small wardrobe to hang our clothes, as we had a long travel to France. For shorter stays or travellers with small luggage the apartment is just ideal!