The canal St Martin, where Julia's flat is located, is a very good region to discover Paris outside the main touristic area. The area around the Canal and Place Republique can be trick, with some noise and not some secure streets. But her flat is located in a very nice area, quite street, surround by many shops, bars and restaurants. From there you can reach easy anywhere in Paris by metro, bus or walking.
The exchange with Julia was easy and fast, and the check in was also easy, although she was not around. The apt space is good for a couple or max a couple plus one. Unfortunately, the flat has some issues in my opinion. First the cleanliness. The flat seems to have been cleaned over the years only superficially, for example the kitchen floor was stick, the curtains are very dusty and the overall furniture. The apt also aged a lot from the pics. Among the appliances, the kettle has issue, sometimes works, sometimes does not, there are only two knifes (one big meat knife and a small one). The washroom which is upstairs, integrated to the bedroom by a half wall, have only some curtains to provide some separation, but they are broken. Also, there is no curtain or small glass at the bathtub and as consequence the water splashes everywhere during shower.
If well cleaned and the amended the apt is sure to be a gem but in the current state the price/ quality ratio is not balanced.