Khal's apartment was great. A friend and I stayed there over a weekend (Friday night - Sunday afternoon), and he was great about accommodating us on short notice, even though he himself was out of town. We used the couch as a second bed, which worked great. This is a perfect location if you are looking to be among neighborhoods that skew younger or more hipster, but the apartment itself faces an internal courtyard and is very quiet. It's a 10 minute walk from the heart of Le Marais and Quai de Vesey, which is lined with young people drinking, eating, and smoking at night. (Great, if that's your jam!)