Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: um no
Review: These soles do not increase your verticle, I tried them for a whole week, and on average there was absolutly no increase in my verticle jump. Im 5'11'' and can get my fingers over the rim, with these soles i could actually get a little less than that at first because there kindof slippery under the soles, which also caused extra stress on my joints.They may improve running but i doubt it, its just extra weight. [...]
