The location is just fantastic. You live at a very short walk from the Louvre and Notre Dame. The streets and cafes in front of the apartment are always full of life.
The WiFi was on the slow side: I think the most I got was 13 Mbps. This worked for us for doing video calls, but you probably don't want to be making another call or doing any streaming on another device at the same time.
The apartment was surprisingly comfortable (for Paris). The kitchen was well equipped and had plenty of counters, which was a must for us since we were planning on doing some occasional cooking in our long stay. the bedroom and living room were spacious (again, for Paris). The bathroom looked very small in the pictures, but we had no problems with the actual size.
Giacomo was very responsive and quickly addressed any requests we had.
When we arrived, there were installing an elevator in the building. that was finished by the time we were leaving, and it was very convenient for moving our luggage.
In general we had a great stay at the apartment. I would recommend it to anyone looking for more comfort than the bare minimum (which is what the other apartments we looked at were offering).