I think for some, like me, it can be more then a pain.. It can be quite life altering.. Imagine waking up for nearly two weeks in a row feeling depressed, anxious, dizzy, sluggish and wondering the entire time, "what the fark is wrong with me" only to realize that it's the coffee...
Anyhow, word of caution to some..
Want to talk espresso but not sure which forum? If so, this is the right one.