the first time i used it i gained about 3-4 inches
then the second time i used it,with some extra stuff i gained about 5 inches

it is probably the best program for anyone willing to put time and effort into increase their vertical no matter wat level of training/equipment/circumstances they have

check out the journals and testimonials section there r ppl doin vjb showing their results there

i higly recomedn it 4 anyone