The apartment is in the Kreuzberg neighbourhood. It's just a few minutes on the metro to most of the tourist sites. Less than 1km walk to Meringhdan & Yorckstrabe stations. Also, bus stops within 200 meters take you to three stations or the city.
It's an old apartment but has everything you need to be comfortable. Warm shower, cosy bed and heater.
Hiang is a friendly host who gave me good advice and paid attention to little things like coffee in the morning and chocolates in the room.
Oh and if you stay here there's amazing currywurst & kebabs at the Meringdham station.