Fantastic location in a quirky old building just steps from the Louvre. We visited almost all the famous places and with the exception of Versailles walked from the apartment (some of our walks were long!). The bed sleeps well, and it's reasonably quiet at night, but you are in the middle of a city and you will occasionally hear street noise.
Pierre was very responsive when we had an issue with the refrigerator and got it sorted out quickly.
American visitors should know the dryer is the same unit as the washer, we don't often see these units in America, you have to run a long cycle to use the dryer, but it works well once you figure it out :)
Be aware you should supply your own paper products, there was toilet paper but no paper towels, dishwashing soap, laundry soap, etc. There is a Carrefour city grocery store 50 yards from the place which will have what you need. Usually AirBnBs we stay in have more of these things.
Overall provides a great base for Paris adventures!