Great location. Lots of perks such as a phone system that allows for free international calls to some locations, a great guidebook for both the area and greater Paris, etc. Love the balcony and view of both central Paris in the distance and the cafe below. Great way to have breakfast. Host Agnes was not around but we were well-taken care of by her friends. Would happily stay here again.
The only negative we experienced was music being played by a street band one night (we were there for 7 nights). The band played until 3 or 4 in the morning. It was during a heat wave, so we had windows open. In hindsight, we should have closed the windows and turned on the fan provided in the flat. I did notice that the closed windows do keep the noise out well.
Hope to make a return trip some day to see some of the sights we missed! We had a great stay, and loved Montmartre.