Quite honestly, I've never even heard of P & O. Just did a google and looked it up and sounds nice.
Have a fantastic time and let me know how you like it.
Mariner-05/06 & 10/09
Oasis Inaugural Cruise-12/09
Monarch-03/10 & 07/10
Mariner; RSS- 10/12
Independence of the Seas; 12/07/13; Booked
Enchantment of the Seas; 01/24/14; Booked
Legend of the Seas; 04/16/2014; Booked