This was my first time ever going to Paris (I traveled solo) and, I must say, Sebastien is truly deserving of his "Superhost" badge.
Upon arrival, he showed me to the flat (which was very clean, tidy, and comfortable) and spent quite some time teaching me about the metro system, making recommendations in regards to restaurants and tourist attractions, how I might want to schedule my time in Paris, and etc. Not only this but, if I had any questions at any point in time, Sebastien was quick to respond and provide assistance.
Personally, I really liked the location of the flat due to it being quiet, accessible, and charming which was especially nice to come home to after a long and eventful day in Paris. In addition to this, there are many high-quality restaurants within close proximity (one of my favourites was "Le 17.45") and there are metro stations within short walking distance (5 minutes) such that one could easily explore the rest of Paris.
In conclusion, I highly recommend staying here even if you're going to experience Paris for the first time. Trust me, you'll have nothing to be unsure of with Sebastien as your host. As a result of my experience, I know that I'll definitely be staying here when I return to Paris in the near future.