I received the DOU for myself and a companion everywhere on the ship. Booked two cruises with it, Magic in August and Celebration in February. I called Carnival to find out the details, and when I asked what the difference was between drinks on us and Cheers!, the representative told me DOU includes everything the Cheers! package does, but that we would have to pay the 18% gratuity on each drink, whereas the Cheers! package includes gratuity. So we did the math and decided the DOU would still cost less (with our average cruise drinking habits) than the Cheers! package. Hope this helps! ( yes, I know the OP was from several years ago, but since people are still responding and the offers are still out there, thought it might be helpful to share what I've learned)