I love ECA. I think I've tried it 3 times now in the last 5 years. Each time it was the same... I had veins shooting out and abs shining thru in just a few days. And I felt awesome at first. The energy was great.
Then I got the heart pitter patters, I got pissy, and then I got sick - flu or cold each time. I don't know how it beats up on the immune system, but it sure did for me. Plus when I got off it, my nose got hella stuffy, as I was enjoying the nice sinus=clearing it provides.
it's great stuff, I just can't take it.