Guillaume was a great host. He was very communicative, and the apartment was as described. From Gare du Nord it was an easy trip on the number 4 train, and the apartment was conveniently located to Saint Germaine and major attractions such as the Louvre. The apartment was clean and bright. The interior room is exposed to the sound in the courtyard, so if you're a light sleeper and the neighbors are noisy you might be disturbed, but otherwise no reservations. I'd stay with Guillaume again.