Cristina's place is wonderful. It's far more spacious than most Parisian rentals and is actually better than pictured. There's a large closet area (which is highly unusual) and walk-in shower. The location is unbeatable — 2 minute walk to Place de la Republique, 2 doors from a grocery store, and a few blocks from most anything you may need (stores, restaurants). Being on the ground floor makes it cool (which was especially important with the heat this summer). It's also relatively quiet, since it's in the interior courtyard of the building. You might hear a slight rumble from the metro underground, but we found this to be a bit soothing!
Cristina was a wonderful host, meeting us on arrival and providing a super-detailed list of instructions (e.g., how to use the washer) and recommendations. She was very available (but we didn't have any reason to contact here during our stay).
We highly recommend this place and hope to return next year!