Originally Posted by
guv1976
All three of those lines are considered "premium" cruise lines
With what hierarchy? In a hierarchy I posted in another thread, I use what I've seen most commonly used by TAs of mass market, premium, and luxury. I personally would definitely consider Princess, HAL and Celebrity to be mass market.
(premium would be Azamara, Oceania and luxury would be Silversea, Regent, Seabourn)