As a sophomore in college, I will almost never take more than one 70mg of Vyvanse (for those who are not familiar, that is roughly equivalent to 35mg of Adderall) every week, but sometimes I only take half in order to take it twice in a week. I was "prescribed" with ADD some time around Freshman year of high school, but my parents refused to put me on the pill. Pretty damn good parenting if you ask me, seeing as I was such a piece of shit at the time and had more or less developed an addiction from taking my best friends pills regularly since around 5th or 6th grade. Disturbingly enough, we would snort them in our private, 20 kid, Catholic middle school both in class and in the bathroom. I remember my buddy's nose gushing blood one particular time, but hey, we were just some shithead kids I guess that got our "druggie punk" phase out really early. So uhh that aside...
Vyvanse is a bit too good in my opinion. As an English major, it really bothers me when I procrastinate on my papers to the point where I need to take a Vyvanse and write for 8-12 hours straight the day before the due date, yet this tends to be the route I always take. Some other bothersome things with it are the complete lack of appetite and sleeplessness associated with it. I already can never sleep - I didn't sleep a minute last night and took about 50mg of Vyvanse at 6am today. I proceeded to read 80 pages of William Faulkner's The Sound and The Fury, half of Quentin's section and te entirety of Jason's, and I must say the book totally clicked with me for the first time after about five hours of thorough reading. The pill allows me to focus on each and every word and interpret them in ways I sometimes wonder if I would, or even could, when off the pill.
So I'm not quite sure what my stance is on Adderall ... I used to take a shitload of them when I would be grounded in High School and just play video games literally all day, and would have no problem with it really. But now I most always use it in an academic sense and it really is incredibly effective. I would never get prescribed seeing as I would quite probably form an [even more] unhealthy addiction, but I don't see much reason to stop taking it altogether.