Pros: It was a great location for what we wanted, right by public transportation. It faces a courtyard, so it was nice and quiet at night. And it was near restaurants and shops for anything you needed as well as a short walk from the Eiffel Tower. It felt like a very safe apartment building.
Cons: VERY still and stagnant/hot air in the apartment at night. Contrary to other reviews there is no fan available even if you ask. Also no early check-in even if the day before your arrival has no guests.
Overall the experience is very much what you would expect. Small but clean and good for two people visiting Paris.