All in all, our stay was great. The place was VERY quiet, despite being in a busy area, and it was a very comfortable, large bed. The location is also incredible. About 5 min to the Louvre, a 5-10 min walk to the main shopping areas, and amazing food/bars/shops steps out the door.
I would have rated this a 5-star had the check-in process been a bit smoother. If you have any issues getting checked in, there is a real estate office just 2 doors down from the apartment that had the keys and will let you in. Other than this, though, I would stay here again and would HIGHLY recommend it to anyone visiting Paris that wants to be central to pretty much everything! :)