Sandrine's apartment is beautiful and in an amazing location. As others have forewarned, it is a 4th floor walk up on a pretty narrow staircase.
The apartment is beautifully designed but almost to a fault. Design details trump practically at times. For example, the entire apartment is very dimly lit (the toilet room felt like it was lit by only night lights). And the sinks are very shallow. The shower only seemed to have one tempature option as it was hard to control. That being said, these are all small details in an otherwise beautiful apartment, but definitely something to be aware of if that bothers you.