Julien is a very sympa and nice person. He contacted us and help us solved the problems. His appartement is lovely and convienent which is next to several metro lines. It's easy to get food in the supermarkets, or convenient food just downstaies. His appartement is well equiped, only you have to carry your luggages to the 4eme floor. And if you stay a long time and willing to washing your clothes, you could find a laundry just oppsite of the house.
Thanks to him that we have had a wonderful time in Paris.