Thank you so many, Jérôme.
1. Jérôme picked us up at the airport so we can leave our luggages in his car and he gave us the key. This is the best arrangement anyone can get. We stared to tour around the minute we landed.
2. He is very responsive to our questions. We don't have wifi so we can only communicate with him when we are back to his place. He answered our questions fast even it is late night. This is a great help. I would recommend any friend to stay here almost walking distance to any place we want to go.
Ps: Even many places in Paris say free wifi, you really can't connect to them..