Lucie's place was fantastic. Really quiet building with a beautiful courtyard. Comfortable bed, nice shower, beautiful apartment and balcony. We weren't sure what to expect of the canal area but it was super cool, young, and hip. About a 5 minute walk to the Republique metro stop. Not a super far walk from the center of things either-- about 30 minutes?
One thing to note is there's no AC, but it wasn't a problem for us because it cooled down at night. There is a fan and large windows to bring in cool air.
It is a smaller space, only main 2 rooms-- the bedroom and kitchen/living space. But it worked fine for my husband and I for the 4 days we were visiting.
I wouldn't hesitate to recommend this flat to anyone traveling to Paris! We didn't meet Lucie in person, but she was extremely kind, accommodating, and communicative.