This was my first experience with Air BnB and it was spectacular, thank you. This apartment, "Severin," is exactly as described. A beautiful two story apartment with fantastic access to the heart of Paris and a spectacular view of Notre Dame. Michel left very detailed instructions on how to access the apartment, which worked perfectly without a hitch - and there is also useful information within the apartment to help the Paris first timer get their bearings. Lucas met us upon arrival to give us the personal walk-thru of how to operate the TV, washer/dryer, etc. Full kitchen stocked with tea coffee, large fridge with freezer, big bed upstairs and a fold out downstairs, and one and a half bathrooms. The full bath with a FULL size tub - which I think is pretty rare in Europe. The apartment has lots of windows and we enjoyed having a glass of wine on the small balcony upstairs in full view of Notre Dame.
Location and Access: The apartment is less than a five minute walk to the entrance of Notre Dame and Saint Chapelle, and it is also situated between two lesser known but great to see churches, St. Julien Le Pauvre and St. Severin. The Cluny art museum and the Sorbonne are within 10 minutes walking, and finally the big daddy of them all - The Louvre - is almost exactly one mile, and an easy walk along the Seine. Further on access is no problem with the Notre Dame/St. Michel metro also within a five minute walk, and it has a direct line (no transfers) to Eiffel Tower and Versailles.
Restaurants and shops: There are literally a hundred restaurants and shops of all kinds within 4 blocks of this apartment. All of the Latin Quarter establishments, and also the restaurants/stores around the Sorbonne. Our favorite eats for the vacation was Pho 67 which is about 20 steps from the front door, and then a crepe for desert at the place right next to it.
Stairs: I couldn't leave this post without mentioning the stairs. There is no elevator to the apartment, there are a bunch of stairs. There is no issue with the stairs, but they are unavoidable.

Overall, this is a great first experience for us on Air BnB and what a wonderful apartment and owner! Thank you Michel, we will be back!