My husband and I went on a cruise for our honeymoon on Carnival. We were young and wanted to have fun. We met other newlyweds on the cruise as well as many other couples that would meet up after dinner for some dancing, music and comedy shows. Now that our kids are grown and we go to bed early, we cruise on Princess. If they are looking for a nice, quite honeymoon, Princess would be great. But if they are looking for more of a party atmosphere, I would recommend Carnival.