It is a wonder drug for me. I used to spend a majority of my time farting around on the internet at work, then working long hours and scrambling to get my work done before the deadline. Now I am able to be productive more consistently and don’t miss nearly as many deadlines.
The early days of uni for me were the first time I was actually responsible for ensuring that my med supply continued and that's a big part of why I'm hesitant to try tapering off of it - it was incredibly difficult for me to find the motivation or the energy to actually fill up my prescription if I had let it lapse and the days (up to eight in the worst case) I was without meds I completely dropped the ball on schoolwork and other responsibilities.
So I'm worried about tapering off since I'm concerned I might not be able to stop tapering or I would burn a lot of goodwill/financial security recovering from the tapering off if it went poorly. That all said, ADD is different for everyone with different levels of apathy and concentration, I wouldn't be surprised if mine was a particularly potent variety beyond what most folks deal with but, with meds, I'm able to cope and have a nice life.
The philosophical questions about personhood don't really ever stop nagging away at you in the background, but I'm happy with things as they are - sorry if this was a bit of a downer response ;P
I only take it at work so I am pretty much just sitting in front of a computer when I'm on it.
It also serves as a link to your insurance provider in each location, so reimbursements are automatic.