I did the family pack for 99$. I did myself, 2 of my kids have one, and my sister who had hers on a separate xbox. It actually added all the time left on our current accounts and added it to our family account. I paid a prorated amount of 60$ and have xbox live for 4 people now until 2013. When I went to my sister's house I had to do a 'recover gamertag' because hers was absorbed into my family account. After that, it was all back and running as normal. You have to add to one box, but can take and use on anothers. Love that family pack.