The pros:
--Our host Julian responded to our inquiries and requests extremely quickly. He was warm, friendly, and most helpful, even going out of his way to call a taxi to take us to the airport (many thanks!).
--The apartment was super clean, spacious, and stylish. We 3 adults loved the spacious kitchen (nice layout!), dining area (a real dining table!), living area (awesome TV), and foyer (perfect place for ironing setup; BTW, Julian had the best iron in the world). The shower had very strong pressure, and the bathtub drained quickly.
--The WIFI was fantastic (the best I'd experienced at dozens of Airbnbs at which I've stayed)--clocked in at 100+ Mbps for both downloading & uploading.
--The neighborhood was great for us--we got to experience the local life. Right across the street was an outdoor food and flea market (opened Tuesday, Friday, and Sunday). We bought vegetables, fruits, fresh herbs, fresh chicken, unshucked oysters, pants.... Beyond the market was Place des Fetes Metro station (which was a 10-minute ride to the Hotel de Ville Metro station for our visit to Notre Dame). Just a block or two beyond was Pho Hanoi, where we ate delicious pho and bun. In the opposite direction (less than 10-minute walk) was Parc des Buttes-Chaumont, a beautiful place to walk, run, picnic (one must not leave Paris without experiencing a picnic in a park!). We bought croissants for breakfast every morning from different places in the neighborhood, and were pleasantly surprised that we didn't have to venture farther than the Monoprix supermarket next door for excellent chocolate croissants.
The cons:
--The doors to the toilet room and one of the bedrooms were very sticky and very difficult to close, but once fixed they shouldn't be a problem for future tenants.
--The shower head was a handheld type (I didn't see a place to hook up the shower head for hands-free showering, and I didn't bother to ask).
--The bathtub was a bit high--might be a problem for people with compromised mobility to safely get out of the bathtub.