I ran two cycles of it last spring. Do what flex says, to gauge your tolerance. I personally went up to 11/day, but I also did a pyramid so as not to crash coming off. Remember to drink a gallon of water a day while on and not use it for more than 2 weeks straight. Also, I never took it after 5 p.m., as I couldn;t sleep if I did.
...
6 9
7 10
8 11
9 11
10 11
....
Then ECA for two weeks.