TweetOh, it will give you great focus and energy. The big thing is WITHOUT the jitters like normal stims. half life is good. Take it first thing in the morning and you will sleep fine that night. Take it middle of the day....no sleepy. I try to time it at about 9am, this way I do not fall out at 6pm. The half life is about 12 hrs.
Play with timing and dose. I have gone up to 500 mg which was not needed. I have found 200 mg works almost as good as 300 mg.