Location: Perfect central location where almost every major tourist site is within a 20 minute or less walk. Especially convenient to the Luxembourg Gardens about 10 min away. Great cafes, stores and playgrounds in every direction. Also recommend bread/pastries from Poilane. Right next to Le Bon Marche, Conran and La Grande Epicerie. Two small interesting religious sites on each side- Chapelle Notre-Dame-de-la-Médaille-Miraculeuse and Chapelle des Missions Étrangères.
Apartment: The apartment was clean and well decorated shabby-chic style. Very functional and comfortable. Host left all basic kitchen items needed which was great. Some logistic items to note: apartment has both dishwasher and washer/dryer, there is both a shower and a tub, one bedroom has a bed only suitable for a small child (bunk style with ladder), the master is separated from the other bedrooms by the living room, and there is no elevator (but only second floor). Judith was also nice enough to lend a baby crib for us.
We would definitely stay at Judith's again, she was responsive and easy to communicate with. We had a wonderful time celebrating Christmas in Paris!