My girlfriend and I had a great experience staying at Matthieu's apartment. Matthieu was very gracious and hospitable. When we first arrived to the apartment, he met with us and gave us an overview of the place and answered all of the many the questions we had about the apartment, the local area, and Paris in general (he speaks English fluently). He provided us with a guide he personally created on all the different restaurants, bars, supermarkets, and attractions to see in the area of Belleville, where the apartment is located.
The apartment was very clean, cozy, quiet, and all amenities you'd need such as Internet, coffee maker, bath soap, towels, etc were provided.
The fact that there was a metro stop on the same street as the apartment was also extremely convenient for getting around the city.
We felt safe and comfortable in the apartment, both due to the pleasantness of the apartment and due to the hospitality of Matthieu. Thanks Matthieu