My wife and I spent several nights at Djibril's place. His place was very clean and offered plenty of space for a traveling couple. We especially appreciated the in-unit washer, as temperatures reached above 90 degrees outside during each day of our stay. Not having an A/C was not very problematic as the house cooled down sufficiently with just the windows open. As a backup, there's also a fan in the living room.
The apartment is located in Le Marais, a hip neighborhood with a plethora of restaurants, bars and shops - great for taking a half-day break from exploring the rest of Paris.
The 1 line is a few minutes' walk away, and you can get to the Louvre and Arc de Triomphe/Champs-Elysee without a transfer. We could reach everything else easily after a transfer or two.
Djibril is a great, responsive host that wants to make sure that your stay is comfortable. He greeted us when we checked in and I have had no problems communicating with him. Check out was very smooth too.
I would just note that Djibril's place is part of a complex where all of the units face a small courtyard. Noise travels easily, and yet we found the permanent residents to be generally quiet. My impression (as noted by Djibril) is that the inhabitants appreciate that peace and quiet. That was what we were looking for, but it may be worth taking into consideration for other potential guests.
In sum, we had a wonderful stay. Highly recommended.