Lovely place. The host is really nice and responsible. As we visit Paris every year for the long time - this apartment is one of top situated places I’ve ever stayed. It’s perfectly sized for couple without kids: not too big, when you don’t understand what you’re paying for, and not too small, when you’re painfully trying to find some place for you underwear. Simple, cosy and relaxing.
Definitely recommended.
P.s. don't worry too much if you have to leave your luggage at their office until check-in cause early check-in is barely possible- it's really a 15 minute easy walk, at the same time you’re walk along the wonderful Pont des Arts.