I have. Great sleep actually and woke up on time/early. I wasnt the regular tired feeling, but when i hit the pillow, 10-15mins i was out.
The second day I took two caps (9am/4pm) had a great energy filled 3hr workout/cardio and went to bed just fine. :woohoo:
I definetly felt the energy kick, motovation, and focus one hour after. Also the appitite suppression was good too all day.
I have read reviews and stuff here about sleep issues, but while taking my sample pack, I have not had any major sleep issues.
Of course, we all have our own sensitive limits to stims. I am pretty durable in that sense. I can have three cappacinos and go to bed an hour later. Coffee doesnt effect me that much at all. I might experience more negs if I was on this longer than 4 days.