Very late reply,
@kaup , just arrived! One of my kids took it as soon as it came out, for ADD. No diabetes complications in his record though. It worked So Much better than ritalin, because the "end of dose" wasn't a crash, it was a gentle float down. I think it had less insomnia effect, too. That was a really long time ago!
I understand that there is some talk/speculation about its efficacy with certain types of dementia, and I know it's abusable, but that's all I know.