i was fortunate to get sample of velocity shot/velocity caps/cryogenix pre-workout. the velocity shot was suppossed to be a double dose, i took the entire bottle and didn't get a whole lot...the velocity caps on the other hand called for a 1-3 cap dose, so i took 3...felt really nice for longer than usual on stims, i like these much better than the shot....but the cream of the crop was the cryogenix pre workout, i used the entire sample pack and had really terrific results-get some of this, it's good stuff!!!