Hello,
Just wanted to share my experience.
This is an example of a "Move Over Offer" It's my first time to receive this offer, so I did research first. Don't know how one gets selected, probably starting with those without cabin assignment.
Obviously this trip is overbooked and I had a guaranteed mini-suite (it was less expensive than a balcony during booking (? - as I usually book balcony).
I wasn't given an assigned room yet.
So I received the offer via email yesterday - the offer is for a 7 day future cruise for free and my current payment for this 4 day Thanksgiving cruise is transferred to my new cruise as refundable cruise credit (any unused amount is mailed back as a check). I still kept all the other amenities, such as Princess Plus, OBC from original cruise, SH OBC (didn't have to apply again). They also have a $400 allowance for personal travel expense.
Essentially, my future 7 day cruise is FREE +(plus) I get a refund for the 4 day Thanksgiving cruise fare.
Note that they transfer the tax and port fees to the new cruise - no refund here. Sometimes they offer a cabin upgrade, but not in my offer (ex. inside to oceanview or balcony). But they did upgrade the type of mini-suite.
If you receive this offer (via email only), don't hesitate to accept it (after finding your next dream vacation). The new cruise did not have a single occupant discount, so basically they covered my double occupancy rate.