We had a really great time in Paris, we fall in love with the city.
It was a good choice to book the room in Mathieu's flat. The house is a typical Parisian building with a pretty good location, the flat was nice as well. Maybe the sofa could be a bit more comfortable.
Mathieu was waiting for us at home, we received a small gift and a free map as well. He helped us with useful information (also prior to our arrival).

There is a big Monoprix very close to the house. (...additionally, a cute cat is living in the flower shop, next to our building.:))