This is an old hotel with lots of charm. The rooms are not very big, and some of the rooms are on a walkway, making your door also your window. But the airconditioning works, the showers are good and the beds are comfortable (even though ours was a spring mattress, we slept really well on it). There is even a pretty good wifi, although the strength diminishes if you are further from the lobby.
The hotel has a really cute courtyard with lots of plants and flowers, and the location is perfect, right in the old town of Colonia, with everything a short walking distance away. The parking behind the hotel is also really nice if you come by car.
Only disadvantage: I did not see a lift in the hotel (might have missed it though). There are only one upstairs floor, but if you have trouble walking stairs, this might not be the hotel for you.