We stayed for two nights at Marc's place, and it was terrific for our group of 4 adults. Two slept in the attic space while the other two slept on the pull-out couch, both were quite manageable. The flat itself was great, bathroom was clean, Marc even let us use some of the stuff in his kitchen. Wifi was excellent, no disconnects at all. Overall, it was a great stay and I'll be sure to book with Marc the next time I come back to Paris.