This is one of my very favorite strains. I am unusually vulnerable to feeling anxiety and paranoia when using cannabis, Jack has never even made me tense. A reliable calm and uplifting experience that doesn't cloud my mind. Functional daytime medicine. I avoid this when I do school work, but that's about it. Only downsides in my experience are: morning headache (if smoked to close to bedtime) and unending, irreconcilable munchies. I would heavily recommend this strain to anyone dealing with PTSD, anxiety, depression, eating disorders, and Chemo. Honestly, if I where diagnosed with cancer tomorrow, my 3rd move would be to find Jack Herer in flower and clone. Do yourself a favor and go find some, a very special strain.