We chose this cruise because we have to go somewhere in March (July, Sept. and also Dec.). It turned out to be a delightful choice. After spending 6 days on our own in Amsterdam, we boarded the Grand Circle Cruise Line's River Aria river boat for a trip up the Rhine River, then the Main River to the canal that takes boats over the European Continental Divide to the Danube (it is blue in parts). Although I've spent a few years in Germany, traveling on a well run river boat gave me an entirely different perspective. My best part was waking early and going topside to watch the low fog tainted shiny glass canal rush towards our bow as white geese lazily paddled in lines along the dim grass banks. Another memorable experience was riding smoothly in a 400+ foot boat as we rode across a wide riven and watched a long line of cars pass under us a hundred plus feet below going at least 50. The boat was nicely appointed and the crew friendly, efficient, and accommodating.