The place is even nicer than the photos indicate. A great location basically next door to the Marche des Enfants Rouges (food market) and a nice grocery store as well as plenty of cafes and restaurants. But there can be traffic jams when there are demonstrations at Republique, so think about this if you are taking a cab to arrive on a Saturday. While it appears to be on an alley, in fact, the taxi/uber was able to deliver us to the front door.
If the weather is cold, be sure to turn on the radiators as soon as you arrive as the big windows that make it so bright also mean it can be a bit chilly. But there are plenty of extra blankets if you need them.
The concierge service uses a key pickup amenity a few blocks away (near the Republique metro). This is great because you don't have to wait for someone to show up with the keys. On this trip, however, I was traveling with my mother in her wheelchair, so it was a bit inconvenient. So, they happily sent someone to meet us with the keys at the apartment. The staff were so helpful and responded immediately to all my texts.
Overall, we were very happy with our choice. The elevator and all spaces were accessible with the wheelchair. The shower is a step up but very large. My mother could have used it if there had been a shower seat.
Would stay again if we were staying in this part of town.