i'm sure others will chime in but i have some experience as an adult with Vyvanese. I decided to try out going on meds for my own ADD to see how it would feel if we made the decision for my son. Vyvanese was the best (i also tried adderal and another i forget the name of). I felt very organized and had no more trouble with concentration, but did not feel like i was on "speed", like adderal. The problem for me was that my insurance would not cover it and it was very very expensive. We ended up putting off doing meds for my DS.
irene