This is a really good location. 3 min walk from Notre-Dame cathedral, just south of Seine river. Lots of nice restaurants and street food like crepes all around. Went with two children so could use the sofa bed in the living room. Jean was very professional and was always available over text message. He suggested great grocery places and restaurants. Home had WiFi which was very handy. Big Bus open bus tour stop is 3 min walk. The apartment was very good.
Some people may want to consider the following things:
1. The apartment is on the 4th floor and no lift/elevator.
2. It gets noisy in the night - even around 2/3am. I heard groups of people walking around the neighborhood shouting/laughing etc. They seemed like having fun but it was hard to sleep with that noise. I closed all windows and then it helped a lot with the noise, but then it got very hot inside. No fan or air-conditioning. This was in August. That made it difficult to get good sleep at night.