Guillaume was an excellent host! We stayed in his lovely Marais apartment for 8 days. He contacted us well in advance of our stay to provide details, and the information he provided was thorough and easy to understand. He recommended some great places to eat, explained the locations of the nearest amenities, and gave instructions (with pictures) for everything from picking up the keys to washing our clothes. Though we did not get to meet Guillaume, he was available throughout our stay and checked in with us via text often. The apartment was as described and we found it to be nice and clean. The bed was comfortable and the shower was sort of American-style (compared to others I've used in Europe) so that was nice as well. It was quiet at night because the bedroom faces a courtyard, and the apartment location was great! It's basically right in the center of Paris so every area is walkable (if you have the time and the footwear), and there are metro stations very close if you prefer to travel around that way. We did a little of both. Guillaume also left us a note and a bottle of champagne (we were on our honeymoon), so that was a nice touch. I would recommend this apartment to any couple staying in Paris and can confidently endorse Guillaume as a great host.