Does anyone have experience with bidding for a cabin upgrade on Royal, Celebrity, or Norwegian? Instead of offering free upgrades shortly before sailing, they send out emails to guests in lower cabin categories, allowing them to enter a bid (if they want) for one category or more higher.
I'm wondering what everyone's experiences are here with that, good and bad? And if you've done it, if you'd share what you bid and whether or not it was accepted? This has been around for a few years now, and MSC just recently announced they'll be doing the same thing.