We thought Julia's apartment was absolutely lovely. We kept saying what a perfect apartment it was to live in in Paris. We especially enjoyed the towel heating rack and the nespresso machine. Julia was such a sweet, forth coming host: I messaged her kind of late at night about things and she was always so quick to reply. The sofa bed is literally the most comfortable sofa bed I have ever slept on in my life, and I've been in a lot of sofa beds. The building also feels extremely secure. Julia also left us some breakfast foods, which was so sweet of her, and she was so nice to meet and gave us a few suggestions for food. We also changed our reservation to a day later than it was initially and she was very accommodating of this. She also left us towels--one each-- which we greatly appreciated. She left the wifi password on he chalkboard and was there to show us around the apartment, even though we were an hour and ten minutes late for check in (which we alerted her of with some courtesy).
The only downsides I would say are the water heater and the height of the loft bed. You have to flip a switch and wait a bit for hot water (and Julia told us this, and I don't imagine it's that uncommon among Parisian apartments). My friends were a little intimidated by the height of the loft (I am five four and I could only hit the bottom of it with my head if I jumped: not even on tip toes). One of my roommates is five ten and she was not too tall to stand underneath it by an inch or two, so that was all fine. The room smelled very much of smoke, but as it is noted in the amenities that smoking is allowed and this is after all Europe we were not too floored by this. We left the door open, spritzed some air freshener, and it was all fine.