Serge's apartment is ideally situated within easy walking distance to Gare du Nord and hence to most of the attractions of Paris through walking, bus and metro. The place is clean and comfortable for two people and the ground floor location is ideal. The apartment is situated at the back of the block through a courtyard so even though this area is very busy and noisy on the street, the peace and quiet, once you get into the apartment, is a pleasant surprise. It got a little warm and humid during our stay so we would have appreciated being able to open the windows for fresh air, but this is not an option. We didn't meet Serge due to our arrival time clashing with his work commitments but his colleague was very helpful and obliging.