If you are an early-riser, on the go kind of person, the next paragraph doesn’t really apply
I was in a ground floor unit so some of my notes may not apply to units on higher floors. The lobby acoustic design is awful. It’s made entirely out of tile (floor/walls) which reverberate any noise, and amplify then several folds. The unit walls are paper thin and it has single pane windows. Any whisper on the ground floor, in the unit next to me, in the lobby, in the private court outside my window, I would hear. I never got good rest the entire time. Add to that the cleaning staff yelling about their shift assignment, and a terrible smell in the lobby (since I can hear every conversation around me, I know that the staff knows it smells bad, but they don’t have the gear to fix it).
The wifi, while decent, kept dropping (every 5 minutes) on my laptop while I was trying to work with a VPN. Made it impossible to get work done.
Location for sure is amazing. Rue Cadet is a 100% Parisian pedestrian street, with artisan shops, bars, cafés, and restaurants, in a lively neighborhood. But apple to apple, I would have been better off grabbing a hotel room nearby. Especially for that price.