The only negative for this particular activity was the timely arrival of the bus. It does not arrive every ten minutes more like every twenty minutes. The bus was clean and the driver was courteous. Very good value for the money spent.
Il n'y avait pas de tour ce jour là du fait du marathon de Berlin. Viator a accepté une réservation pour un circuit qui n'existait pas.J'ai été débité. J4ai pas eu de tour.Impossible de me faire rembourser....
The route and narrative were fine but the sound system needs some maintenance. If the one at your seat is too garbled, I recommend moving to another seat as its' plug in may be better. Also, be prepared to only have one earbud in the earbud set working. I asked for a second set but it only had one earbud working too.
This tour is a great way to get around and get the lay of the land in Berlin. The 2 day pass is a great bargain as it's only a small increase over the one day. There are audio guides on the bus as well.