My husband and I chose to purchase 'The Key' on our Spring Break cruise this past March, Since we did not want to spend the extra money on a Suite Class cabin, we chose to purchase some of the benefits that come with Suite Class staterooms.
Priority Check in was fast, easy and we did not wait in line at all!! We walked right up to "The Key" check in desk and it was about 5 minutes of standard check in information, then we were off to the ship.
Carry-On drop off. We then proceeded to the carry-on drop off area where we dropped off some items (stroller, carry-on baggage). It was labeled and brought to our stateroom.