We stayed 12 nights and loved it! Raphaele was so gracious and helpful.
The apartment was clean, comfortable, and beautiful. I found the use of color and decorations very relaxing. The bathroom is huge and luxurious. There is lots of space to put all of your things in the apartment.
As others have said, the location is perfect. Having a bakery and small market next door was very convenient. We took the metro everywhere and were about 5 min to both Hotel de Ville and Chatelet-Victoria entrance. We were able to leave from these two places whenever we used metro. It was also nice being able to easily walk many places (Rue Montogrueil, Les Halles/Monoprix, Latin Quarter, Sainte Chapelle, Louvre, Marais). Honestly, you could have a great vacation just staying here and enjoying restaurants and sites within walking distance.
For a longer stay like ours, you might need to bring/buy a few things like shampoo, soap, dishwashing soap. It was fun to pick out some French products to use!