As we like that part of Paris very much, we always try to find an appartment in the Ledru-Rollin / Marché d'Aligre / Gare de Lyon quarter. And we had never found an appartment that was THAT close to a subway / metro exit ...! ;))
Our impression of the appartment corresponds "grosso modo" to the feed back of our "predecessors". The esthetic loft character of the (rather small) appartment is even more impressive in reality than on the photos. The communication with the owners is very uncomplicated (and they have their office/s/ quite close to the appartment, so they can pass by immediately, if there should be any problem.)
As you can also read in other comments, the appartment is not totally calm - as it is located at the junction Faubourg St. Antoine / rue Ledru-Rollin. (Unfortunately there was also additional noise because of renovation works in a house just vis-à-vis.)
Double beds in France are in general very small ..., but as the couch was easily convertible into a second bed, that was no problem at all! ;-)
A little suggestion: There is a Nespresso machine in the kitchen, but there might be still clients who would prefer a more traditional filter coffee machine.
We appreciated the generous storage possibilities (there are so many appartments where you have to leave all your stuff in the suitcases ...).
By the way: Maybe it should be better not to arrive with too big suitcases, because the staircase is very narrow and the stairs very steep! (The appartment is in the second floor.)
A last point, which we had already discussed with the owner and which, for different reasons, is not easy to "verbalise" in an appropriate way, but certainly reflects a relevant aspect of Parisian reality: Very often, "clochards" sit and sleep very close to the entrance of the house. They are not "dangerous" at all, but at the beginning you might be a bit shocked by the presence of those poor people ...
But notwithstanding our few critical remarks, we want to conclude by saying that we felt very well in this appartment!