We had a lovely stay at Michel's apartment. We especially appreciated the location of the apartment, which was within walking distance to the Eiffel Tower, metro line 8, and many buses that would take you to the prime tourist and shopping areas throughout Paris. The apartment itself is right next to a pedestrian street filled with restaurants, fresh produce, and a bakery -- a great place to get food.
The apartment itself was very clean. The entrance felt secure (you need to enter two pin codes through two sets of doors in order to access the apartment area). The only issue that my partner and I encountered during our stay was occasional noise from the upstairs neighbors late at night (loud music/TV/parties from ~10pm-2am). Besides that, our stay was very comfortable. Michel was a great host and provided lots of information about how to access the apartment, check-in, and check-out, as well as recommendations for restaurants in the area. We would recommend staying at his apartment if you're planning to visit Paris.