Yes, personally i have been clean and not so much right now, but as you state about the chronic use, in my experience the detrimental effect on sleep also tends to disappear...the afternoon coffee does disrupt sleep without tolerance but in chronic use you don't even notice any benefit from it so it makes sense it would at least disrupt sleep considerably less.
I do also think chronic use with COFFEE could be beneficial since the blood pressure rise is usually no longer present with chronic use. But i guess we would be venturing too far out if we start talking about coffee/caffeine, please point me to a thread if there is one.
