Having read some reviews before booking, I wasnt put off, and I seem to have had less issues with this hotel than others.
As other have highlighted, the rooms are basic. My room was clean and I had no problems. The Wifi is good, plenty of storage space and hot water when I needed it, although the shower itself was a little low on pressure.
Getting into Koln is easy, the train station is 90 seconds from the hotel, the ticket is 3 Euros and getting to the centre of Koln takes about 20 minutes.
What wasn't helpful was that the hotel doesn't have thinks like irons/ironing board for use by the guests. Its a shame because its easily fixed and would make a big difference.
Other than that, the staff were friendly and helpful, speak reasonable English if you don't speak German, and always available.More