Yeah I have one and never used it. I think it's to expect a privilege just because I had surgery. But if you want to use one, it's your choice. Anyhoo, I hadn't seen mine since my surgery in 2008. I came across it and found it's not totally worthless; it has a diagram of the DS configuration on the back. (Like I'm sure showing DS guts to a server would make a big impression to begin with.)