Not worth it. This is such a scam, they make it seem like its some kind of fantastic hop on hop off. The bus comes by every 50-60 min. starts after 10 am and stops at 4, better be at that stop befor 4 or your on your own. You wont get to see anything its a joke.

I paid for a tour of salzburg on the traces of Mozart and the guide gave us only a tour of the gazebo and lake for the sound of music. When he took us back to the panorama tour office he handed us tickets to the mozart museum and told us to take a taxi to the musem the next day. We never got to go, still have the tickets. This tour was horrible. I think the guide just made stuff up as he drove around crazy. Not trustworthy, Shaddy and bad tour.
Don't spend your $$$ on this..