First off, Julia is an absolutely amazing host! Always responded so quick to my inquiries and it felt like I was in good hands. We even met in person for a coffee once and she also welcomed me to the apartment. She is warm, caring, responsive and friendly. I stayed for four months and some things I wish the apartment had: washer + dryer and a freezer. Though there is a laundromat and grocery store a minute's walk from the apartment so it wasn't too much of an issue.
I think having a super responsive host and being in an amazing part of Paris within walking distance to all of the major sights is what makes this listing stand out. Apartment is tight but super manageable for one or two people. Enjoyed the many restaurants within walking distance. Saint Germain des-Pres is probably the nicest neighborhood in all of Paris so I highly recommend this place.