As I understood when I placed my bid, as soon as it is accepted it is charged to your credit card, so you cannot decline the upgade once its approved. Thats the downside of the upgrade bid. You may get a better cabin but it could be anywhere on the ship. Also I believe you would pay double for upgrade from solo to balcony., So if you bid 70.00, you would be charged 140.00. Hope you get the room that you'll love!