I stayed w. Matthieu while in Paris for work. Matthieu's apt in the 18ème is charming, spacious, and tidy. It's located in a less touristy part of the city and is v. close to public transport, supermarkets and shops. Matthieu was easy going and very welcoming. He also speaks English fluently having spent time living in both the US and UK. I would highly recommend experiencing Paris life "chez lui" (at his).