We got to Budapest too late to do much of anything.
The Danube River ( which Viking never tells you even when asked) was low which we now know is common. We were forced to change boats from the Tor to the Var and couldn't use top deck most days. It was the best place to enjoy the scenery and relax and get some fresh air so very missed.
Because of the low water this turned into packing, a long bus trip, and unpacking.
Okay, but glass was filthy on the second boat. We could hear pipes knocking every time someone in our or the adjacent room turned on the water...day and night. Kept us up. Others complained about the same thing.