I booked Gaspard's apartment for my mother who was coming to visit me in Paris. The apartment was spotless, comfortable and perfectly located for someone who still wants to be able to move around the city but not be in an overly touristic area. Gaspard was extremely reactive and easy to communicate with - and when a storm knocked out the WiFi, did his best to fix the situation and offered us a discount.
Our only suggestion would be a welcome packet explaining how to use the coffee machine, the AC, etc. which might not be obvious to everyone, especially foreign travellers. I'm told there was also a moment when someone came into the building knocking on doors for money, which is neither Gaspard's fault nor uncommon in Paris! The building is in a secure area, located in the back of a courtyard with two codes to get in, so it seems like it would have been a complete anomaly.