Let me start to say that we thoroughly enjoyed your Hop-On Hop-Off tours in Copenhagen. However, our experience in Stockholm was a disaster. The buses were late and dangerously crowded. Then to make it back to the train station on time, we had to take a cab on a seven minute ride that cost over $30. Someone mentioned that many cruise ships were in port, but this should have been anticipated by Viator with the addition of more buses.