The apartment is very well located, a 5 minute walk to two metro lines, a 15 minute walk to the airport RER B train, Notre Dame, and the Luxembourg Gardens. There are a lot of shops and good restaurants in the immediate area.
The apartment easily accommodated two guests, with a bedroom and also a sofa bed in the common area. The kitchen and bathroom are both user friendly. There were some patches of mold at the kitchen sink and in the bathroom around the tub.
Yangyang responds to e-mails promptly.
The major negative was the noise. There are a few bars on the street that stay open and play music until early morning hours, the customers also go outside to smoke and talk. While my daughter slept through this, the street noise made it hard for me to sleep, even though the windows were shut tightly and the apartment is on the fourth floor.