Fantastic location and views. The place is extremely well-located: convenient access to many major sites, the metro and direct RER to the airport, but also right near the quieter streets of the Latin Quarter and Sorbonne area. The little churchyard in front the apartment is a wonderful oasis to sit and bring a drink, sandwich, snack etc.
The view from the apartment of Norte Dame could not be better. It might be blocked with more foliage in the summer, but while we were there in the springtime, it was sublime.
Everything in the apartment was as advertised. The place is not large, but it is well equipped and charmingly decorated.
Michel the host was extremely helpful with many logistical tips and restaurant recommendations. He was very responsive when we had an issue with the WiFi at the start of the trip. It is clear that he takes great care of the place and great care that guests enjoy their stay.
I would highly recommend this place for a couple or an adult with a child. A few ares to note: The stairwell is extremely narrow. My son and I found it charming especially with the pretty fresco paintings, but it could be difficult to navigate for the elderly, very young children or anyone needing to carry bulky luggage. The bathroom and shower are also quite narrow. A larger person might not find it comfortable. Finally, the internet connection is not industrial-strength. As we were on vacation, it was not at all an issue, since the only inconvenience was when we streamed films/video late in the evening (interruptions with buffering etc.). However, for anyone needing to conduct professional zoom calls during their stay, the connection might be a bit unreliable.
Overall, it was a wonderful stay and I can highly recommend it.