I mean every coaster is rough as long as you ask enough people about it. The key is to make the unavoidable vibrations flow with the ride itself and Taron does that wonderfully. People have odd expectations about the smoothness of any rail-mounted vehicle, and fair enough, most people aren't engineers.
Very true. As a point of reference I am yet to find a gerstlauer that I can ride more than 5 times in a row. Yet I was able to stay on the same train on Taron over and over for an hour and 15 mins during our ERT. My arms were definitely aching by the end, holding them up for that many rides was more effective than a gym session... but no headache or usual rough coaster pains