I booked our first cruise a couple weeks ago. But I am now reading that if I transfer to costco (we are still within the 30 days) we can earn a costco cash card. But from what I am reading, you give up "control" of your reservation. What exactly are you giving up control of? We already have our rooms picked out, I understand that our payments will go through costco, but is there more to it? I am trying to decide if we should transfer it. I like to have control, but the gift card might be worth it!