My family(4) stayed for one week and the apartment was very comfortable and spacious - especially so for Paris! The two bedrooms and large living room were really appreciated, and although the apartment is on the busy Boulevard Beaumarchais, with the windows closed it's quiet inside. We felt like we lived like Parisians for the week. Fantastic boulangerie(bakery) just across the side street, so we had fresh croissants for breakfast every day and baguettes for lunch! Plenty of nice shops and restaurants nearby as well as the lovely Place des Vosges (historic square near Victor Hugo's house) just around the corner.
3 metro stations in easy walking distance so you can go anywhere in Paris. Great market on Boulevard Richard Lenoir nearby which was fun with some interesting sellers & local characters.