Sebastien's apartment is incredibly well located for exploring Paris and is very good value for the area. The space includes a nice living room with a couch, kitchen space, and a nice bathroom. The loft upstairs is easy to access by a ladder. The photos of the bed upstairs are slightly misleading, as the pillows are arranged on the long side of the bed in order to make it appear larger than it is. Our only other complaint is that it was a bit tough to cool down the apartment on a hot day (a portable air conditioner is provided) but I suspect that is not unusual for Paris!
Overall we loved our stay and highly recommend the apartment as a home base for exploring the city