Having been on over 25 cruises with P&O, P&O Australia and Princess cruises, I find myself at the bottom of the barrel with Pacific Dawn. Having previously cruised on her about 2 years ago, I can't tell you how different the two experiences were.
Embarkation was chaotic, however saying that I was on board within an hour of reaching the cruise terminal in Brisbane. I told the lady at check in that I was a seasoned P&O Cruiser, and she very kindly gave me a priority embarkation number. This allowed me to get on board much quicker than I had anticipated.
The ship has dated beyond belief, the carpets were worn, the ship stank of sewerage on several occasions and my cabin was probably the second most disappointing aspect after the food.
Midship cabin, not noisy, has 4 berths and individual hanging spaces for 4 people.