The apartment is really cozy and located in really a perfect position nearby the station and close to some nightlife areas. Antonin is really a nice person and welcoming.
The apartment is at 5th floor with no elevator. Pay attention to this if this is an issue for you. For me it was absolutely not. The bed is a sofa bed but really comfortable. The kitchen is well equipped and you can also find some basic products for cooking (salt, oil, vinegar etc).
The apartment is really quiet with no noises at all. A bit of light in morning time from curtains if you wake up late. In general a very good ratio value for money from Paris.