I stayed in Koro's apartment with two work colleagues and we absolutely loved the apartment! It is beautifully designed, located in the best neighborhood in Paris, and overlooks a beautiful inner courtyard. The apartment was also perfectly clean.
There is a master bedroom, two conjoined bedrooms (without a wall in between), a bathroom with shower, and another bathroom with only a toilet. There is a lovely large living/dining room and a functional kitchen.
The wifi worked perfectly, and Koro was very responsive to our communications.
We would all highly recommend this apartment to visitors to Paris, and would love to stay again!