The apartment was clean with very comfortable beds (though single duvets) in a good location (close to U-Bahn station, good restaurants, and shops). Trudy had also supplied a helpful guide of the area and some maps.
There's a small lift that really only holds one person, so unless you've shopping to getting up you'll probably end up taking the stairs. Also, the Wi-Fi is pretty slow, just about good enough for emails and loading some maps; we mostly ended up using our mobile data instead. Overall the apartment is stylish and comfortable with a few quirks, but a good base for exploring Berlin.