Just got to say, with no hesitation: this flat is in a brilliant location and Christian was a welcoming, helpful and communicative host.
The accommodation is clean and tidy and has a great WiFi connection - which is an essential lifeline for tourists.
The flat comprises a bedroom (comfy double bed) with an breathtaking view of Sacré-Cœur; and a combined living area (with pull down sofa, TV and Free view Channels) and small kitchen area (microwave, induction hotplate and washing machine available as well as pots, pans, cutlery and plates etc) with a breakfast bar overlooking an evocative rooftop cityscape of Paris: never savoured a croissant at breakfast so much...
Christian texted us to check everything was OK, and was keen to offer advice about any practicalities (like where to shop and how to get to his flat from CDG): I felt really comfortable contacting him to ask questions, and he was always pleased to help.
Montmartre itself is just a great area to stay: Easy access via metro at Anvers to anywhere you want to go in Paris. There's also a Funicular near the Metro that practically takes you to the front door.
Highlights for me in Montmartre where the family run Pizza joint below the flat, the Espace Dali 5 minutes walk away, Sacré-Cœur itself, and a brilliant Jazz Bar (Bab Ilo) 7 minute walk away. Montmartre has atmosphere, and the streets around Montmartre on the other side of Sacré-Cœur are packed with local art shops, restaurants, street artists and trinket shops.
This is my first time using Air BnB and Christian made it a really positive and welcoming first experience: will be using his flat again for sure.