Rémi's place is exactly what you can expect from a typical Parisian roof apartment.
The location is great, close to stations of metro lines 12 and 4, as well as Sacré-Cœur and the equipment of the apt was complete in every possible way.
The apartment itself is on the sixth floor, so the stair climb can be a challenge for some people since there's no elevator, but it's manageable if you're used to that kind of stuff.
As a host himself, Rémi always had very swift responses and left a lot of generally useful tips as well as suggestions of places worth going to.
I can't do anything else but recommend his place to everyone :)