Never met hosts this welcoming! This is my first experience with Airbnb and it couldn't have gone better. Even though we arrived late Friday night, Marina took the time to meet us at the closest train station and not only helped us get settled in but also gave us a sense of what's what in the neighborhood and answered all questions we had about Paris. They also made sure that we knew that they were available at all times, which they also proved - service like never before!
The actual living space was also really nice, felt modern and could easily accommodate 4 people sleeping in 2's. Even I, who's 197 cm was able to sleep very comfortable at the bed couch. The only downside is that there is plenty of stairs to access the apartment, but shouldn't be any problem for someone healthy who's in Paris for a extended weekend trip.
The location of the apartment is also very good, with a metro station taking you to the major stations in just a few minutes, allowing you to get anywhere in Paris without much hustle.
In conclusion I warmly recommend staying with Marina and Stephan!