We stayed at this hotel either end of our cruise on the Danube booked with River Cruise Line. On the way out we stayed in a room at the front of the hotel, we did wonder what the ear plugs in the bathroom were for, we were to find out on the way back. The Sunday night was fine with a nice meal. There was a little noise from the trains but it was a Sunday night, so a reasonable nights sleep.
We arrived back in the hotel 8 days later, A Monday night, we were in the back of the hotel, outside our room was a narrow corridor, outside of the window in that corridor was the railway line with virtually non stop traffic, I'm not talking normal size trains, I'm talking long industrial trains.
When we asked to move room we were told the hotel was full. we did have a nice meal that night but no sleep.
It was like living in one of those cities in America with the railways right outside the window.
I did complain to the hotel at the time, to no effect. I did complain to River Cruise Line also to no effect, other than saying they inspected all of the hotels they use.
My advise don't use this hotel but if you do check the room out first.