The apartment was great. A perfect location in the middle of everything for the authentic Parisienne experience. Check in was easy even though we arrived very late. Although we did have to pay 50€ for check in after 10pm which was a little disappointing.
Other than that, everything else exceeded expectations. The facilities were excellent, there is a (very small) lift which we only used when we had luggage. The three flights of stairs were fine. The apartment was very clean and we had a great five days. Would love to stay there again some day..