Flex I have done the 2 week on 2 week off and with my experience I got nothing from the Clen. I did do some research after I had done my cycle, and found that the 2 day on and 2 days off is the best way to get the maximum benefits out of Clen. Some will disagree, however, Clen downgrades receptors very badly, and with the 2 days on 2 days off, this keeps the downgrading to a minimum.
I got nothing from a 2 week on 2 week off cycle, except a bunch of side effects, and some sleepless nights. I had better luck with Xenedrine. My plan is, when I get off this current stuff I am on, I plan on doing the 2 days on 2 days off of Clen, and I am sure my results will be better, cause I got absolutely nothing from it before.