This is an excellent apartment in the middle of the Marais. It is very conveniently located (close to many attractions, for example, about 5 min walking distance to the Pompidou). As the windows are inward-facing (to a courtyard) it is also very quiet, which I found quite pleasant. The apartment itself is spacious (for Paris standards), has nice high ceilings, and felt like a home to me. I stayed for a month and would stay there again any time. Not sure if the ad mentions it, but the apartment also comes with a washer/dryer in the bathroom which is very convenient for longer stays.