It was very closed to the koln central station and cathedral ! amazing location. Thats probably it.
The staff were pretty strick on their weird rules tho.. they were NOT flexible at all!
and in my hotels.com reciept it said I won't have to pay for the city tax if I prove that I was there for business, so I email them before hand, what I would need to prove and the answer was: "We are not sure because It is charged by City not us", What?? We pay city tax at the hotel, not at the cityhall. They don't know what they were doing for the most parts.