Location location location! 2 blocks from the Louvre and two blocks from Musee D'Orsay! A wonderful bakery across the street and three blocks from Monoprix - the huge grocery store where the wine steward was incredibly helpful and food was fresh and delicious. There are myriad bistros within 1-10 minutes, and the Seine is right there so you can't get lost. We were a family of two adults in our 50s, and four adult kids in their twenties and there was plenty of room for us all and the two full bathrooms was very helpful.
The only negative, for some people, is that the apartment is 5 floors up very high winding stairs. It felt a bit like walking up a tower. You should pack a backpack or heavy shopping bag to carry groceries, wine etc up the stairs. This may not be the right place for small children or elderly because of the climb.
The kitchen had everything you might need to cook meals - large refrigerator, stovetop and oven, dishwasher, and all the necessities. The downstairs bathroom has a washing machine, and all the appliances work great. The bathrooms are spacious, especially for Paris, and the bedrooms all have comfortable queen size beds and plenty of linens. One of my kids had to sleep on the downstairs sofa, and that worked out well too - very comfortable and worked out great.
Cristina was a great host. She was quick to respond to questions, offer suggestions, and when I wasn't sure exactly what time I was arriving, she stayed in the apartment and waited for me. I have rented many apartments in Paris and one of the biggest inconveniences is that the hosts are often late meeting you, and when you have luggage and are jet-lagged, that can be a terrible start. I was so happy that Cristina was there to meet me! Cristina was so nice and accommodating. This is where she lives, and thus the apartment has loads of photographs, art objects, and an overall aesthetic that reflects her architecture background and artistic taste, which is very nice!