I've tried em all, usually cant tell much difference. Recently finished a tub of, which was OK, good for pump, low stim / no tingle. Then started Stimul8- holy **** what a difference! Gotta be careful dosing this, probably the strongest I've tried. Love it with some added. I liked Gameday too, it may be best overall; will have to run it again after Stimul8 for comparison.