I stayed in Alexandre's apartment with my boyfriend last weekend. It was a "difficult" weekend in Paris because of all the manifestations of the yellow gilet (and not only them!). But Alexandre was really helpful to give us all the informations about the areas of the city where it was not recommended to go and he also stayed all the time in contact with us asking if it was all okay and if we needed something. This is kindness!
The apartment, even if is small, is perfectly organized, every space is thought and designed with cleverness so you can find everything that you need for your stay. Perfect for a couple. The street is colorful and full of shops of all types, near to metro 4 and 8.
The only annoying thing is that it is at the 5th floor without lift, but anyway it's worth it because you have a romantic view of Parisian roofs :)