Maison de Sirenes is a lovely space - larger than the pictures might lead you to believe, with 4 beds (2 twins in the "living room," 1 very comfortable queen, and 1 day bed in a smaller room off the main bedroom). The apartment has old bones, but that adds to its charm. Full kitchen with utensils/coffee machine/toaster was a great amenity, bathroom was clean and airy. Cute decorations everywhere.
The surrounding area can be a little loud at night, but no more than expected in a big city. The apartment is up 3 flights of stairs, which wasn't a problem for us, but should be considered for guests with a lot of luggage or who are physically unable to climb the stairs. The host does have a lot of rules to be followed that are posted around the apartment that she strictly enforces, which can be a little nerve-wracking.
We communicated with Nathalie exclusively via text, and were able to check in and out without any issues. Would recommend this space!