I take 3 tabs with 200mg caffeine, occasionally washed down with a coffee, lol.
I really like before a workout, but I will be using it as a thermogenic aid in the coming months to cut, will probably take above amount twice a day, every other day, or else the effect will definitely not be as strong. I have gone as high as 3 doses a day, but you don't sleep much then. The only thing that sucks is the off days, if you're not using it to cut down then really use it sparingly.
That was pretty fun about you springing out of bed after a half hour, cause I was like how you going to go back to bed after taking it, cause I feel like running a marathon. At the beginning you may feel like you do just after you get off a treadmill...that you're walking at warp speed.
Work your way up to a higher dose over time though and you should be ok, and never take after 6pm unless you want to rave it up that night!