You really can't go wrong with this lovely apartment. It's a good mix of genuine Parisian experience with a few important touches of "home" for foreigners like myself.
Let's start with the host and apartment owner, Reynaldo. Lovely person and such an accommodating host. Helped me with my (very) heavy bag on arrival and again as I was leaving. Worked around my schedule during check out so that I wouldn't have to find a place to pass the time with all of my luggage. Even went out of his way to make a reservation for me at a restaurant, as well as coordinate a taxi on my way out. Definitely wouldn't get this kind of personal attention in a hotel.
The size of the apartment is on the smaller side (from an American perspective) but very cozy. Definitely suitable for one or two people. It's a typical Parisian home so the structure is quite old but Reynaldo has done a good job of including some modern items that would make non-Parisians more at ease. For example, the bed and pillows are very comfortable, the bathroom is updated, and there's a good size flat screen TV + blueray DVD player for fellow movie lovers. Large windows in each room made for great lighting and air circulation.
The location is wonderful. Montmartre is a great area with tons of shops and restaurants to spend hours (and money) in. You won't have any reason to be bored. The Montmartre area was usually quite busy and full of people, but the actual street the apartment is located on is pleasantly quiet and safe. Being a single female traveler, safety was a big factor for me and I felt comfortable leaving and returning as I pleased. It's also located just a few shops down from a wonderful boulangerie where I ended up a few times for a quick and cheap lunch. All the tasty and tempting restaurants were great, but made a dent in the wallet so this boulangerie was the answer to my prayers. Not to mention the pastries are magnificent!
All in all, this was a wonderful airbnb experience. I would recommend Reynaldo's home without hesitation.