I would absolutely recommend staying at this flat, I found it to be of great convenience for me. The location was ideal for me, it was close to family and a direct line to the center of Paris!
The flat itself is a cute cozy place, it's on the sixth floor, but the morning view is beautiful. I personally liked the way the palace was decorated, its a cute and quirky but the assortment of books in the flat make give it a humbling feel.
There are plenty of shops and bars near by, the metro is only 5min away, couldn't ask for more really..!
Marylou is such a lovely host, she's quick to respond and also thinks ahead in terms of a guest's needs. It's definitely a place I would come back to. Id say it's a perfect place for single travellers or young couples.
I can honestly say that I had a great time in Paris and I would attribute that to the convenience that staying at this flat brought me. :)