Mixed experience. The good: 1) Staff was very nice, spoke multiple languages, and were generally accessible. The bad: 2) Two story boat, tour says is with air-conditioning upstairs - there was none, signs said do not open window or keep doors open, it was over 80 F at least 30 + C, very uncomfortable, 3) No one explained that the music was mainly downstairs only, only places to sit for dinners downstairs, so upstairs got done music later when the musicians walked around - by the time due to no air conditioning we were outside - only those inside had tables downstairs, 4) Seating - a chart should be supplied as we had horrible seats upstairs in no air conditioning with our back to the farthest wall so you could not take decent pictures or see properly - while someone needs to sit there I booked well in advance and would never have chosen those seats, Observations: 5) Musicians were good even though most of what we did hear was through speakers, 6) Food was basic Vienna buffet and there were enough choices so dinner was adequate, 7) We liked going through the locks, 8) Scenery was different than expected and fine for about two hours, three hours was long.
Once was enough at this location. If you can pick your seats wisely.