Just returned from a great Danube Waltz cruise - BUD-Passau on the Ingvi. We had the included air. Did not use Air+ and had excellent flights (ATL-FRA-BUD and MUC-ATL). Layover in FRA less than 2 hours was plenty to go through immigration and get to next flight. Several Viking greeters met us and about 10 minutes later were on bus with 8 others to boat. Cruise Director Suzy hopped on bus, welcomed us and said cabins may be ready (around 11:30 at this time). Ours was and after unpacking we had lunch onboard and left to explore the Central Market Hall.
Weather was cool mornings, warm afternoons. Cold, windy and rain in Bratislava which made it hard to enjoy. A little rain in Vienna but not too bad.
We took the underground to Schonbrunn Palace, bought tickets at the kiosk and had a great visit for less than $50 total for two. (Compared to $180 for Viking tour)
Lower floor, duck view cabin. Not much room but enough for our needs. Bed was really good.
Windy, cold and rainy so tough day in Bratislava. Downtown walk was good but weather did not allow us to spend us much time out as we would have liked.
Really enjoyed our time in Budapest. Walked all over and saw a lot.