Sep 12, 2011 - 9:28 AM
Hello Lion22. Yes, you could use your free transfer to Flüelen - provided that you use regular trains when getting to Flüelen - and then receive a 50% discount for the Wilhelm Tell Express boat ride.
Trains in Switzerland generally are very punctual, but of course one can never be sure. Personally, I'd take a bit more time for this change of trains, as you need to board a train that requires seat reservation (so if you miss out on it, you can't simply hop on the next one).