Hell of a product. I used to get two to three hours of sleep a night. Now I am getting 6 and I feel great. The first two nights I took it I woke up much earlier than usual (3am instead of 5am) but I was awake enough to hit some early morning abs and cardio. My sleep pattern eventually regulated. Another plus is that my soreness has greatly decreased, so I am able to train insane everyday without any issues.