They seem to succeed. While I am Aachen based and often have to travel to ZWS (Stuttgart) for work, taking the train is the best option (106 EUR return in 2nd class with B/C in about 2:50 h oneway). However, thanks to the vouchers, I have done several flights this year on the DUS - STR route, although the total time enroute increases to about 5 hours (including a safey buffer for the train feeder to DUS), not to mention the carbon dioxide emissions .

As an FTL, this becomes even more attractive, as I can use flights departing later than the last acceptable train connection. However, I wouldn't do that if the flight was not cheaper than the train option. So, keep the vouchers coming