Staying at Gonzalo's house was wonderful! It was my first time as guest and I feel like to accommodate me a friend (this is the philosophy of AirBn). The house was clean, the bed was very comfortable, the bathroom clean and accessible, too. The house is exactly in the metro station (20 meters) in a good and safe area, so it is easy to find it. There is not elevator in the block of flats but it's not problem because Gonzalo's house is on second floor.
Gonzalo is very easy to talk to and quite helpful. He prepared for us a list with some places in Paris.