Mounir was a great host, very responsive and helpful. Apartment is as pictured/described, heater worked well and wifi was very fast, sofa bed was very comfortable. It's on the third floor with no elevator, but staircase was wide enough that I had no problems brining my suitcase up/down.
Good location, 20-30 minute walk to just about anything in Paris. Lots of cafes nearby that are open late, so even if you're waking back very late at night, there are many people around and it's very safe.