I am on Adderall, but the XR didn't do anything for me and wore out quicker than the regular release.
I was on Adderall XR on a trial basis a few months ago. At first it worked super, but when I got it the following month, about half way through, it actually made tired. I was taking 30mg capsule 2 times daily.
Now I'm back on the regular Adderall, 20mg 3 times a day. For me it is definally better than the XR, but sometimes if I have a long day, it wears off to soon and than sometimes I end up taking half a pill. The good thing about the regular is being able to break the pill. But the bad thing is that I usually run out to soon and feel like total HELL for maybe 3 days. Those 3 days seem endless! 
