The apartment is a great starting point to explore the city, with U-bahn stations nearby, many cafés, pubs and restaurant. Walking distance to most touristic places.
Only thing you need to know, you need to be a little acrobat and not too tall to get around and in the bed, as it is on a little mezzanine, with only 1m heigh ceiling. However, this was no problem for us, as we knew in advance.
Philip was really prompt to help us with any question or little problems we encountered, communicating with him was easy and quick. He was on time when we arrived and made our arrival smooth.