Matthieu is a great friendly host. I was over an hour late for my checkin due to a strike and some metro stations not working. Matthieu waited over an hour for me to arrive which was great.
The place is cosy, a comfortable sofa-bed, kitchen appliances are available, small fridge, private bathroom (toilet and shower).
There are two close metro stations (Marcadet-poissoniers and simplon), which make it easy to take the metro and go anywhere in Paris.
Sacré coeur/Montmartre are around 20mins away walking distance.
The place is exactly what I was expecting.