A great way to see Stockholm when time limited. Seeing everything from the boat gave it another dimension . We thoroughly enjoyed the experience. No problem using Viator voucher .
We arrived into Oslo at midnight and needed to embark on a cruise at 1pm so we were time limited and very tired. The HOHO bus gave us the ability to see what we could in that short time, even the rain was pouring down.
Full marks to the driver who gave us an extra service of Hop On Hop Off Drop Off, as when we finished our tour we collected our bags from the hotel and he dropped us off 2 steps away from the boarding facilty of the cruise ship (in the heavy rain). What an angel!
No problems using the Viator voucher.