We didn't get to meet Laurence and Giuliano in person because of our late-night flight – instead, we were received by a very welcoming and nice friend of theirs, who showed us around the house and gave us tips about the neighborhood (additionally, when it was time to leave she booked us a cab service back to the airport, just in case).
Laurence and Giuliano offer a very well arranged experience. The studio is clean and in very good condition, and alongside the accomodation's own offerings, they provide a comprehensive guide to Montmartre, Paris attractions, and some very well-appreciated information on places where one can go have breakfast, a glass of wine, a few clothing stores, gift shops, etc. We didn't take their recommendations as our checklist, but we did visit some of them and liked them all a lot.
The only, really tiny downside is that the shower is a bit weak – other than that, we spent n amazing time and wouldn't think twice about spending a few more days at the house.