Originally Posted by
SanDiego1K
We paid 58 euros each plus 2 euros for a seat assignment per ride. In hindsight, I could likely have saved the 4 euros for seats; still, I have no idea how heavily booked the train is come the summer tourist season.
On the Frankfurt-Cologne/Duesseldorf route it really depends on the weekday and the time you are travelling.
If you have to go to one of those cities on monday morning or friday evening you will be very happy to have a seat assignment.
But I really recommend to make a reservation on this section anyway.