Hello! I am thinking about getting a slingbox but I have a couple of questions I was hoping someone could answer. 1. Is purchasing a slingbox the only cost to using the service? Is there a subscription fee you have to purchase or is the box the only cost. 2. If I were to set the slingbox up at my parent's house and access their TV from my computer . . . would my parents still be able to watch TV on their television or since I am using it would they have to watch what I am watching? Thanks! Jeff