The place was terrific! It is a 30-minute walk from the Louvre, Notre Dame, and Sacré-Coeur, and only a few minutes walk to Metro stations that will take you anywhere in the city. The neighborhood itself is lively at night if a bit sleepy by day. It was a bit wonky to find my way in on the first day but I figured it out!
The space is small (you will have to abandon your stretching routine), but perfect for a solo traveler or a cozy couple. It is freshly renovated and the workmanship and attention to detail are great. It was amazingly quiet, though you could hear folks coming and going there was no street noise and the neighbors were not noisy. The bed was comfortable, the shower had good pressure and on-demand hot water, and the wifi worked fine. Not blazingly fast but no lagging for streaming. There is a bar fridge and microwave, an induction cooktop, a washing machine, and a Keurig coffee maker.. Everything except the coffeemaker was brand new as of fall 2021. There are grocery stores, bakeries a liquor store and plenty of restaurants on the same block, and a market with a great fromagerie just around the corner. All-in-all an excellent setup.
I visited in Oct/Nov for 2 weeks, and the floor was quite cold, so have slippers if visiting in winter. The large windows allow lots of natural light, but also face an adjacent and always brightly lit apartment. While there is plenty of privacy, bring an eye mask if you need to sleep in the dark. There is a drying rack in the apartment... there is just enough room for it to not be underfoot when set up. It did, however, take ages for things to dry (it was a damp fall, but the apartment never felt damp). Pro-tip: The building is old (it's Paris!), so turn off the heaters when using the microwave or risk a tripped circuit (easy to reset if this happens).
I spent a lovely 2 weeks out and about and calling this spot home, and I would certainly stay again!