If you don't speak German, don't bother with the guided tour. 87 minutes for 3 sentences not in…read moreGerman: "this is the bed where the electress slept.", "This door is fake", "Thomas Jefferson came here once".
We asked, in German, if he spoke English, and made it clear 2 of the 3 of us didn't speak any German. To which he said yes, he did speak English... and then continued to exclusively speak in German for the entire tour; making NO effort to give us any information.
When I translated 2 questions to ask him, questions about the sculpture/artwork around us; the answer both times was "I don't know".
Save your euro and buy 2 beers/person instead.