Sofia has a lovely apartment in the hot Bastille neighborhood. It's a great location just minutes away from multiple metro stations and Velib bike share stations are plentiful as well. It's a bit small but that's the authentic Parisian experience!
Sophia was out of town when I stayed in her place, but she was still attentive to the emails I sent with various questions and even steered me towards a cheap way to hire a cab when my flight leaving Paris was too early to take public transit.