It would not win me over. Who's ready to decide within the first day if they like the ship or not? Its the experience over the whole voyage that counts.
Getting an out after the first day is not my way to plan a holiday.
Seeing Carnival's name out-of-the news for several years and reading accounts here of happy patrons, might win me over and get me back. Either way, I would only chance Carnival on a brand new ship. Dream was good, but just a few years into its sailing history - wasn't it stranded at sea?