Horrible place, very rude staff, rude and inept and racist manager. The hotel is right besides the Aachen HBF train station, and that means you will hear every single train that enters and exits the station, regardless if your window is open or closed. There is no central air or fan, and this makes for uncomfortable times should the room get hot, your only other option is to open the window, which will expose you to not only the excessive train noises, but the traffic of cars driving by on the very busy street.
Very importantly, this hotel has a club house in its building that hosts several night events each week. During my stay at the A & O hostel/hotel, I was told by the club house staff that certain section of the hotel is not safe for people who are not whites, because they do have skinheads and far-right extremists who come to their clubs, and they can attack any hotel guest that does not fit in with them.
In the kitchen, there is a sign that states on the fridge that cleanup of the fridge and kitchen is done on Mondays, but at the A&O hostel in Aachen, there was no cleanup on Monday or Tuesday, it was a filthy mess with the trash bin overflown with garbage that extended to the floor and with dishes scattered around the kitchen. I then went grocery shopping on Wednesday and purchased 35 euros worth of groceries, cooked them and placed it inside the fridge. By Thursday, I noticed that the kitchen was cleaned up and my food was among the items that was discarded away.