After having Wilderness Athlete for about a year now, I am hooked. The E&F packets, or tubs, are the best because they don't give me the jitters, but I still feel myself wide awake. I take this before any project I do on the computer and I always have this in the mountains! I would give this 10 stars if I could. I will always be getting these from S&S Archery, best customer service out there!