my wife is platinum, i am not. im gold.
can get the bottles of water at the bar as described above. and the ship's pin at centralized location, no longer arrives in the cabin.
the best is the free bag of laundry she gets. kinda nice to refresh the clothes mid cruise on 7+ day sailings.
i dont know if we use any of the other perks. i know our sail and sign card is always at the room by time we get there, well before 1pm. we dont care too much about priority boarding since we usually arrive day before and chill at a local hotel...usually meander to port after the latest checkout time we are afforded.
we went to the party last time and it was a welcome diversion from the usual things we were doing onboard the first several days (chillin on lido, hitting the casino, doing trivia, etc)