There are touches throughout the apartment that make it seem like you already live there, from tea in the cabinets to dimmable lighting. (He even bought us a little bread and some food since we were arriving late). In short, Sebastian was a gracious host, very communicative, and actually met us at the apartment even though the front gate has a code. There was only one small issue our entire stay - and I mention it only to show how responsive and communicative he was: the water heater was on a timer and had turned off, so there was no hot water when we returned one night. I sent him a message through Airbnb and he responded immediately. I was able to fix it with his instructions, but he also offered to come over to do it himself.
Thanks again Sebastian! You really made our stay in Paris wonderful :)