Michel was very fast to reply and accept our request although it was only for 1 night and the room was booked before and after. Even with that, we relatively had a flexible check in and check out time.
The 2 room flat is very very pretty and just like the pictures. There is everything in the flat from clean sheets, towels, soap, shampoos, dishwasher, washing machine, fridge... It was really really good.
And of course, I cannot say more about the location!!! It is really only 2 minutes walking from Notre Dame, maybe less actually!!!
Thank you very much Michel :) I would definitely do it again if I am in Paris.