Very well organised, we left the dock on time. The seating and tables were very comfortable. The waiter staff were very friendly and helpful, always making sure we had our drinks topped up.
The food was great - well-cooked and lots more options than we were expecting. Not so great for vegetarians, but you expect that in a country like Austria. The food was included in the price and we were surprised to find at the end that the drinks were very well-priced, considering they have a captive audience.
The entertainment was very fun. The Austrians had a great time singing along and we joined in as best we could.
A couple of minor things would have made it perfect: the boat waits half an hour for the lock to fill up before it can continue its onward journey. It was interesting to watch for a bit, but in the dark and rain, interest soon faded. However, this was the exact time that the entertainment decided to take a break - there and on the way back. It meant there was no music, we weren't moving, and nothing to look at apart from the walls of the lock. I think this should be the time they keep us entertained and have their break before/after.
Overall though, we had a lovely evening and would definitely recommend it to visitors of Vienna