We stayed at Alain's apartment during our visit to Paris in May 2015.
About apartment.
The location is just great. First of all, the apartment is very close to the Butte-Chaumont park, then you can also reach some other nice places within a walking distance. The metro station is just nearby, so you can easily and quite quickly get whenever you want in Paris by metro.
The apartment is somewhat modest, but has whatever is needed, even a washing machine (though we didn't use that one), important to mention that it also has high-speed internet (LAN + Wi-Fi).
As summary: it's totally great value for the price.
About the host.
Alain was very helpful with providing all necessary information and was always reachable. We communicated via exchanging email or airbnb messages from time to time. The process of getting and returning the keys was easy.
So I definitely recommend Alain as a trusted reliable host.