I stayed at Louis' place for 2 weeks. Louis and Edouard are truly great hosts - responsive, accommodating, and there when you need them. The apartment is in a nice, secure building. The decoration is simple and the apartment is very functional. The neighborhood is great, with a good selection of bars, restaurants, etc. It's not a very touristy area (more on the edge of town) but you get a genuine Parisian experience.