I did not have the pleasure to meet Gregory in person since everything was arranged thru the AirBnB Sitter. However Gregory did check on us thru the phone to see if we're ok.
The apartment itself is clean, nice and spacious. All instructions about the facilities, amenities as well as places of interests are well documented in a thick binder.
We had a wonderful time there with easy access to everything we needed. It's 100 meters away from all the shops yet quiet enough at night. Being in Montmartre adds favourably to it's charm.