Great location! However you pay the price for the location with noise and smell from being in a busy district and an old building--we could deal with the noise but they pumped the sewers one morning and the smell was unbearable. There is room for improvement and the apartment is not quite as depicted in pictures (smaller and not as nice.)
Our check in was delayed by the cleaner not finished when we arrived tired from all day travel. Our biggest frustration was from the note to not deposit trash in the building and to "distribute the trash through the many public bins in Paris." The sink still backs up, the shower could use some work and there is a hole in the bathroom ceiling.
Good for a budget traveler who needs a central place to crash but would recommend considering other options for travelers who have high standards or an aversion to noise/smell. Or for going out and distibuting trash in public bins.