This is the first ECA product I have taken consistently. I tried Xenadrine RFA but had to quit after a couple of days because the jitters were unbearable, that coupled with the fact I could not sleep, the product had to go. This is my fourth week using the product. No jitter and I sleep fine. The first was at half dose and the latter three at the full dose. I have actually been eating above maintenance and not very clean. I weigh about the same (200±3 LBS) yet I look better than when I started. My training has not changed, my eating habits have been less strict, yet I look leaner. Great product At Large. I can't wait until I get my diet in check.