This tour was okay. Our tour guide was nice and knowledgeable, but he wanted to hurry through everything so that I could not stop and get any souvenirs. I recommend just doing the hop on and off bus pass instead. We only had half a day to tour Frankfurt, and too much time was spent on the financial district rather than the historical parts. I really wanted something from City Hall which is there really pretty part of the original town.

The tour provided a good overview on the historical background of the city. Our guide, Peter, knew the city well and the walking tour was great. Thank you.

A big problem was getting to the tour's starting point. On the other Viator tours transportation was more or less provided, here I had to pay 40 euro for the taxi from airport to the tour office, where the tour started. There is a train that goes from airport directly there and the ticket is 5 euro, but you have to know about it - this was disappointing. The tour itself was fine - they show you around the city on the bus with no roof, it's a pretty good view from there and you can make better pictures than through the bus window. Then we walked around the center, saw the old city and new buildings recreating the old architecture. It's a pretty short tour, but that's what you pay for.

Our guide, Peter, was a fount of great knowledge and history, which made for a most fascinating tour. Learned and appreciated a great deal from Peter.

Bus tour was a good way to quickly see lots of places in Frankfurt but wasn't the greatest tour I'd been on. Still, probably a good option if you're crammed for time and want to see a bunch of different things.
Also, the Viator directions say that either an electronic or paper copy of the voucher is acceptable however, I had to argue with the bus driver for a few minutes to let me on the bus because I only had the voucher on my phone. So I'd recommend figuring out a way to get a paper copy.

There's really not that much to see

Great

The tour covers all major historical, cultural and modern places and is very well-organized. Angelika was friendly, knowledgeable and fun! Thank you for the great experience!

The tour guide was very knowledgeable and provided with great insight of Frankfurt that we wouldn't gotten if we hadn't used him.

I didn't have much time, so this 2 hour tour was perfect for me. I got a quick overview of Frankfurt city. The tour included riding on the double decker hop on-hop off bus and also some walking through the city center shopping and market areas. It was great to have a little of both! My guide really knew a lot of the history of Frankfurt city. I highly recommend this tour!