Filippo was very friendly and responsive both during the booking as well as our stay. His friend Kevin who showed us the apparent was not very fluent in English but we managed to check in without problems. He was very nice indeed.
As others mentioned in their reviews, it's worth noting that the apartment is in the 6th floor and there is no elevator.
The bed was comfy and we slept well apart from the first night where there was a party in the backyard across the road and the fridge woke us up during the night. The former was not extremely loud and the latter needs fixing in my opinion.
The location is nice, 10-15 minutes from Gare du Nord and even walkable from the centre (without luggage).
Thanks again for hosting us!