Victor's home was lovely and even better than the pictures. A stunning view of Sacré-Cœur, beautiful natural light, and a fantastic location on a quiet street in a beautiful neighbourhood. Communication was always very swift.
However, we had quite an unfortunate situation with check-in. We had given warning we would arrive late and the host said the keys would be left in a laundromat where we could access them. Upon arrival, the laudromat where they were stored had closed 30 mins ahead of our expected arrival time. When I reached out about this, the host said we would need to get a hotel. They later did not reply to Airbnb's attempts to get in touch about a refund for the first night's stay, which we were stuck having to pay in addition to the hotel we unexpectedly had to book.
If checking in late, I would be careful to ensure the keys will be available to you. Other than that, I would recommend Victor's home for a lovely stay in Montmartre.