This is an amazing deal for the solo traveler or a (very petite) couple. The location is perfect, the apartment extremely safe, and a fantastic home base for exploring Paris for a few days.
HOWEVER, please take the warnings about the size of the bathroom and the apartment seriously. Even for one person, there was very little room, and the shower would be tight for anyone taller than 5'6". If you fit these criteria (or are willing to squeeze) then get ready for a truly phenomenal Parisian vacation.