If you are looking for the most authentic Montmartre experience possible then this the perfect place to stay. Look out the bedroom window to the right and there's the Sacre Couer, look to the left and see the windmills of the Moulin Galette. Open the large windows in the living room and there's Eiffel and the lights of Paris. In my opinion it's nothing short of breathtaking.
We were a few hours late due to security issues in Brussels but our host kept in contact to arrange for a friend to meet up with later in the evening. After a brief but welcoming tour we were on our own and instantly felt at home. We never heard any excess noise from the neighbors or street traffic. There is a small lift and stairs so access is no problem. The flat contains everything we needed for our stay including washer/dryer, phone, wifi, dishwasher, fridge, stove, bathtub with shower, stereo and lots of outlets for electronics.
I'm certain this is the most perfectly located spot in Paris if you are looking for the romantic side of the city that sometimes gets lost in the more touristy districts. We loved it!