The apartment is small, but larger than many hotel rooms, and was perfectly adequate for the two of us. We stayed in the winter, and it is a corner apartment with very large windows, but the heating system was excellent. The neighborhood has narrow streets and is busy with pedestrians, but we were not bothered at all by street noise. The neighborhood has a nearby small but fully-stocked market, and many cafes and restaurants. It is an easy walk to the Louve, and to multiple Metro stations on different lines.
Best of all, the communication with the hosts was instantaneous. They went “above and beyond” by arranging airport transfer for our departure.