We booked with a TA for the first time ever for an upcoming cruise. A couple days ago I made an inquiry about what the cost would be to upgrade from our current mini-suite to Club Class mini-suite...just curious, mainly. Well, she came back and said she was able to get us into a CC mini AND for a lesser total fare than what I was already on the hook for with the plain mini. About a $500 savings!
I realize this is not the same thing as being upgraded directly by Princess...but the upgrade fairy comes in many forms!