We did the world wine tour on our recent Pacific Coast cruise on the Eclipse -- I wouldn't describe it as crazy, but it is definitely a LOT of wine. In case you're not familiar with the event, I believe the price was 30 to 35 PP (again, it was a lot of wine!). On our cruise, it was hosted in Cellar Master's. They had 6 wine stations set up. Each had several different red and white wine options available (2-3 of each), from a specific region (France, Spain, South Africa, etc.). At the start of the event, you are given a wine glass. You have an hour to visit whatever stations you want and try the various wines. They also served some snacks during the event.
We really enjoyed it and thought the wines were better than what is typically available on the beverage packages (though there may be overlap). We would definitely do it again!