I went to Matthieu's apartment with my boyfriend last week. It was a very nice staying. The apartment is as described, very comfortable and beautiful. The bed is very comfortable.
The neighborhood is nice, there is a supermarket very close to the apartment. The subway is very close (5 min. walking).
Although Matthieu wasn't there, his friend Denis gave us the keys and he was very nice with us. He told us what we needed to know. Both of them are available if you have any doubt or problem.
I would come back if I go to Paris again.