I referred to the outdated rooms in the other CP in Nürnberger Straße (which is in a superior location close to the IC and close to Wittenberg Platz). The other CP is as close to the subway as the fake Potsdamer Platz CP, however is on the main East-West-Lines connecting the city centre east and the city centre west whereas the fake Potsdamer Platz CP is on the North-South-Lines. I found the rooms on the fake Potsdamer Platz CP on the modern, but on the smallish (and darkish) side and far away from IC standard. The IC has a bus stop in front of the hotel taking you to the relevant tourist sights in the East and to Bahnhof Zoo in the West.