We loved:
The location - close to a ton of shopping, cafes, food options, metro options, the Seine and the Lourve.
The mattresses - firm yet cozy
The amount of space in the living area
3 separate toilets (though the pictures in the listing are misleading; there's only one on-suite, and two separate WCs).
TV in the living room has casting capability so we could watch or own media.
Could be better:
The street noise was deafening all day and all night! Sound sleep was impossible in the front bedroom (pictured with the stone wall). There was also a ton of ambient light coming from the street all night. The shutters don't close completely and there's only the thinest of sheer gauzy curtains. Host ignored my message asking for help or some kind of possible solution. Light not working in the black bathroom, no conditioner offered. Extra pillows and duvet provided, but not pillowcases, sheets, or duvet cover. The duvet was stained pretty bad.
Fun for a couple nights, but I would find another spot for a future trip.