Small, clean, but absolutely no frills
Location - walked to train station (even with rain, one can go underground through the subway platform). Clean. Wifi worked.
1. Smallest room ever. 2. Elevator didn't work, fortunately was on first floor... 3. No TV. 4. Coffee machine in lobby didn't work.
With a stay at a&o Köln Dom, you'll be centrally located in Cologne, just a 4-minute walk from Cologne Cathedral and 8 minutes by foot from Museum Ludwig. Featured amenities include a 24-hour front desk, multilingual staff, and luggage storage.