Didn't take any supplements for 2 weeks leading up to my first dose. I have had 3 workouts on it so far. I feel like I exploded in size in just that short time, even on body parts I had not yet worked out directly. That being said, I don't think it's been long enough to rule out the placebo effect just yet. But I really don't think it is. I will be purchasing twice the amount as soon as it is in stock and will continue to try it for longer.
I have no problem sleeping while taking 3 pills a day and after using for about 2 weeks I only see benefits and no negatives at this point in time.