Wonderful view and nice close left bank location. The walk up was fine for but may be a challenge for some with curvy stairs. Only drawbacks are the very small elevator (fits one person and a suitcase) and some loud neighbors who like to slam doors around 3 am and smoke from the balconies (not something the place has much control over)
On the other hand, things in their control like comfortable room, responsive service, and access to travel maps- all excellent. I would definitely stay here again.