The tour was extremely informative, but the camp memorial itself was rather uninteresting. Too much is gone of the original camp. The walk to the camp was unnecessary and overly tiring considering the availability of a bus (used for the return). Finn, the tour guide, was excellent. Had the tour not started with an exhausting walk in the sun, then the visit would have been more acceptable. There was no mention in any advertising by Viator that there would be no place to eat and that we would have to pack a lunch (learned that at the meeting point just before departure). Should have been told that there was both a McDonald's and a Subway at the Oranienburg departure point from the train.
This should have been a much more enjoyable tour than it turned out to be. I was pleased that I got to see the three palaces and the grounds, but there was no indication in the ads for the tour that so much walking would be involved (perhaps four miles). Had I known that, I would have scheduled another company's tour. By the time we reached Sanssouci, the highlight of the tour, I was too tired to care. I am 70 but fit, and the lengthy walking could have been avoided had the route been shortened. The tour guide, Jim, was very knowledgeable, but he of necessity hurried us through each stop so that taking pictures was rushed. We were also given only 30 minutes for lunch and no time for stops in Potsdam itself. This tour needs to be re-thought.