This was overall a really great stay! The place is cute and super functional, and I felt safe in the private square. I thought Sabrina's communication was perfect - brief, concise, well-timed, quick, and helpful.
Downsides are that it's a little noisy throughout the night - the main metal door to the square closes loudly and on Thurs, Fri, Sat nights there are people coming home from the bar. Lots of laughter though, which is great! Also the bed was a bit uncomfortable for me, but it is really cute. The setee in the living room was perfect for naps for me - I'm 5'7" - and really comfortable.
The location is an easy walk to Gare du Nord (yes, even with luggage!), which is then an easy train ride to/from CDG. There's a lot of value in not having to hire a taxi or driver to get you and your bags to the airpoirt or the train station. It's on a fairly quiet street, not a lot of street noise at all, but if you walk a block in either direction you're close to restaurants, bars, a market. 15 min to Montmarte, 15 min to Marais on foot.
I think you should stay here!!!