I haven't tried it but some unbiased reviews say its a decent program but can't compete for the top 3 other vert programs...(VJB Jump Experts TVP) it would work if ur a beginner to plyos and have a very low reactive strength base and that's why they say 8-14 cuz beginners scored that if i did that it would probably only take my 26'' to maybe a 30'' if i'm lucky so if u a beginner go for it if not dont spend the $ but i would say to do the VJB