It is a professionally managed tourist rental from a big company (with its typical good & bad sides).
Good aspects:
Location - amazing, between Opera and Vendome Place
Bedrooms - decent size, good bed linen
Elevator from ground to the first floor
Bathrooms: 2 amenity kits left for us (well, there were 6 of us, but nice touch) and 6 bottles of water.
Negative aspects:
They require an extra security deposit (EUR 800 for 2 nights in our case) that they do not return promptly.
One bedroom is without a window and little air, and another bedroom so small that there is about 10 cm between the bed and wall, which makes it problematic to get to the second bed.
One of the WCs has a broken lock and one can easily lock themselves out. We managed to avoid major issues but by looking at the door one could see that lock has different screws, so it was either changed a few times or had to be fixed because somebody has locked themselves out earlier.
Some old stains on the carpet; the place does not feel or look like luxury apartment or even the apartment in the photos.
Too expensive for what it is, despite the location. You can get decent hotel rooms with breakfast in Opera area for that money.
No view: grim inner wall or the roof of the restaurant that gets all kitchen smells into your bedroom.
Summary: would not book from this host again.