I forget if Vyvanse is available in my country, or if it's only available in longer effect doses here. I've also heard about Concerta (is that the name?) but so far I've only tried Ritalin and it works pretty alright if I'm not overstimulated when it starts kicking in.
I have gotten overstimulated when I went out shopping once while it was in effect. Not a pleasant experience, but definitely a new one.
That's a pretty interesting fact about Vyvanse though. What's the window of effect for the one you take?