Rudolph was one of the most knowledgable tour guides we've ever had. In fact, I would challenge you to think up a question, regarding Krakow or Polish history, that would stump him. He is passionate about his job and it shows. If you're worried the tour may be "too long," don't be. There is so much history that you will be hard pressed to squeeze it in. If there is a specific time period or interest you have, let Rudolph know. I'm confident that he would curtail the tour around that interest. I highly recommend this tour with Rudolph!