Once we got going, we had a great tour with Verena. Our voucher indicated we were to meet at the Radius Tours office in the Hauptbahnhof train station, but she was waiting for us at our hotel. It was not that far, but probably cut 15 minutes off of our tour. Verena was very well informed and her English was great. We learned about the history of the city as well as some of the fun stuff beer gardens and May poles.
I would recommend this tour.