WW is both physical and cerebral in its effect...very enjoyful with a long lasting stone that is extremely potent...i had 3 pheno's from a pack of Nirvana and the sativa pheno took bout 11 weeks from seed and was absolutely debilitating...one of the few plants i've tried that only requires a few puffs to achieve the desired effect...a lovely plant and would definitely recommend it...Mr. Nice has the original -called Black Widow- and its a very promising strain also for breeding, etc, adding strength to a great deal of strains