My husband and I stayed here for the one night we were in Cologne. It was further from the train station than we expected so we got a taxi which cost about €15.
Check in was easy and the staff were polite. There isn't anything in the minibar of the room but apparently you could buy stuff downstairs. There is also a restaurant downstairs but we didn't try it.
They had wireless Internet but you had to pay for it and I couldn't get it to work on my iPhone. If you had a laptop you could plug it in at the desk.
There was a desk and tv in the room and a cupboard for storage, also a couple of chairs. The room was a good size and the bathroom was nice and clean.
There wasn't anything that bad about this place other than the lack of wifi, but there wasn't anything in particular which would make me go back either.More