Excellent 5-star vacation in Paris. Perfect apartment, better than a hotel. Location is fantastic, next to 3 metro lines for easy access to whole city. Rue Birague is lovely and the private courtyard is a gem of a place being peaceful. I was apprehensive about the ground floor aspect, but zero worries - it is private, secure and quiet.
There is a TV projector which is interesting feature and we enjoyed watching Netflix on a large screen. The audio is not so good - the bluetooth soundbar is not great and sound delayed and centre audio channel seemingly missing.
The "sauna" is a faux experience although enjoyable, with its warm lights in a wooden structure, which was pleasant to get some mild heat and light in a cold month. Our teens enjoyed time on their mobiles sat inside for bursts of time.
My only recommendation for improvement is to have clearer instructions for opening the apartment door from the inside. The door auto locks upon closing and to re open is not obvious.