I am on day 13 of 21.....doing forehead, neck, arms and hands all at once. Derm said I didn't have to do all at once but I wanted to get it over with. I didn't want to drag this out and ruin my entire summer. So I am a couple of days ahead of you and I am definitely getting my money's worth, so to speak, in terms of pain, itching, burning, and generally charming appearance. :) I am taking daily photos and keeping a journal. I think that actually helps me cope, for some reason.
My sons, also, noted the humor in the name, "EFF - YOU" dex.