My DS was 8 on our cruise this past October. I thought long and hard about this one, and in the end, decided to let him have the priviledge. I explained that at all times, while not with us he needed to be at one of 3 places 1) The Lab 2) the mickey pool or 3) the room. I told him the first time that he was not at one of these 3 places he would not be able to leave the lab at will. Let me me also state that I know my children best, and I knew my DS would not take advantage of this. I even gave him charging priviledges on his key. I was so proud of this boy after our cruise. I think he bought a $20 game card, which I said he could, and a soda! He also only checked himself out about 3 times, and the lab paged us everytime to let us know where he was going. It was really wonderful option to have, for him to be able to check himself in. We were midship deck 2, so as far as getting lost, it didn't happen. Let me also state that I have a DD 7 who will be 8 on our next cruise, and I highly doubt I will give her this priviledge, as I don't think she could "handle" it. But we will see between now and November.