I really like these. I bought the SHOCK (13mm lift) and think that they totally cut down on the amount of effort needed to hard turns. Granted these are not an necessity by any means, but merely a nice-ity. They don't give too much lift where you feel that the center of gravity is off. They do add a little more cushion under your feet as well. I wouldn't ride without these again by choice, but if I am riding one of my boards without them, I wouldn't feel like I would have to change my riding style. I know that sounds like I should give them an average rating, but they are great for what they are, basically an accessory.