Don't fall for the crap they tell you, VP is useless, I tried it for a year and a half and I was part of a bigger group that tested every possible way to use it. Flipping a coin will give you about the same results.
Could you post all these tests so we could have a look them. Maybe you did not fully understand how to use it.
Its easy to bag a product, but unless you can back it up with your test formulas and results what you say means nothing.
Please post these results fro us all to see. I am interested as VP work very well for me. And I can post my results good or bad.