guys... lets put this to thought here... 14% = not much at all...

for a 2" gain, 14% = ~14" vertical...
for a 6" gain, 14% = ~43" vertical... (do you really think a machine will increase your vert 6 more inches when ur at 43" already?)

i know some of you have peaked and 2-6" increase sounds great, but if you have really peaked... ur prob too old like me to really want to spend thousands of dollars just to increase ur jumpin ability 6"... not worth it. keep training the hard way; lifting, olys, and plyos... u'll great all the results you need.

ps.. great find though.