Fantastic location and a really nice sized apartment! Loved the natural lighting, though as another reviewer mentioned some of the windows cannot be shaded so in the summers this could be problematic if you are a light sleeper. No issues for us, though as we visited in winter... Another small thing was cigarette smoke so prevalent in Germany seeps into the kitchen / entry area. Not an issue for the living and bedroom as there are doors separating those areas. However, if you have issues with cigarette smoke, you might want to bear that in mind.
Marc was absolutely responsive prior to our arrival as well as when there was a minor issue during our stay!
Highly recommended!!