There really is no downside to the upgrade. If you are unhappy with the cabin, just speak to the hotel manager or front desk. They can usually downgrade you to another room or upgrade you to another suite at 50% off from the category you are in (c). You pay half the difference of your new cabin (not for the cabin you paid for) and the new cabin. This would be a great opportunity for you if you wanted to upgrade to a larger suite.