So, once you get to the port and find out if there are upgrades available. How do you figure out if an upgrade that is offered is worth it or not? Do you have a fixed dollar amount in mind that you won't exceed, or a percentage? What do you compare the cost against, what the other categories were when you booked or something else? We will only be on a 3-night this next cruise, but I thought this might be a good time to try for an upgrade.