For river cruises we have sailed on Scenic several times. We are a few weeks away from back-to-back 11-day cruises on Scenic on the Seine and Douro rivers. Scenic boats are spacious, well appointed with a friendly, accommodating crew, excellent food and wine selection, and a late-closing bar. Everything is included (drinks, tips, shore excursions) except spa services. Tauck is a tour company, not a cruise line. I expect they would charter all or part of one of the river cruise company’s boats for their tour. For ocean cruising we prefer Seabourn and Regent (also all-inclusive) and Abercrombie & Kent for land tours when we are not traveling independently. Everyone has their preferences and opinions. For us, you can’t go wrong with Scenic.