My boyfriend and I loved staying at Matthias' place in Montmartre. We had some issues getting in the first night due to train delays, but Matthias was very nice, helpful, and supportive. He offered great recommendations for the area and clear directions for getting to his apartment. The neighborhood is awesome with lots of places to walk around, plus easy to access public transportation (2 metro lines, many buses). Took us 30-40 minutes to get to most of the main tourist attractions in Paris. Lovely apartment, reliable wifi, awesome neighborhood. It is on the 6th (top) floor of a walk-up though. Really really good value for the space!