Nestcapade is a charming space. We were three adults and it was perfect. If six adults stay here, they had best be all very good friends with minimal luggage and privacy issues, but for three it was delightful.
The terrace is a treat, the owner and the hostess attentive, and the space clean and well-appointed. The location is could not be better. From the terrace full of greenery, the Pompidou is visible to the east and though the Louvre isn't visible to the west, it's very close. The wee balcony off the upper level has no view, but from the roof you can see Sacre Coeur to the north and the towers of Notre Dame and the spire of Saint-Chapelle to the south. If you want to stroll around the heart of tourist Paris, this is an excellent starting point.
I appreciated the binder that the coordinator assembled with instructions about appliances and notes about the neighborhood. We bought baguettes from the boulangerie a few doors away and fruit from the nearby stand, stocked groceries from the Franprix around the corner, and dined at restaurants nearby. Less than a block away, we enjoyed L'Auberge au Louvre especially, Le Garde-Robe less so. The neighborhood north of St. Eustache is chock-full of restaurants to suit any budget and taste. We had a lovely time at Le Cochon à L'Oreille.
Do not rent this space if you cannot manage stairs, and keep in mind that you have to tote your luggage up and down. The description states plainly that five flights lead to the main level and another to the garret, but it doesn't warn that the steps are worn. The wooden treads have a slight trough in the middle and also tend to slope downward. The lower sill of the dining room window is below knee height.
Overall, a treat of quirky architecture and thoughtful decor. I loved it.