Our family of 4 (parents and 2 young adults) stayed for a week over Christmas. It is a great location and amazingly quiet once you enter the courtyard off the street. The host communicated very well and there were no surprises. The beds were comfortable and the showers worked well.
Some caveats: this apartment has barebones furnishings. The kitchen was devoid of any supplies (no salt, pepper, oil etc). There is little privacy in the dining area (as is evident in the photos) and also in the kitchen due to the glass ceiling with multiple apartment windows above. There were no personal touches such as local restaurant or shop recommendations .
That being said, this is a serviceable well located base for exploring Paris which served us well for our stay.