I have the werner spanker, It weighs 20 OZ, I have had to fix it twice. I had to add carbon cloth and a strip of fiberglas to the end of the tip to make it rock resistant. I would do that again because the right paddle shape and weight are what make it go.
we also have the werner with the colored blade, those blades are fiberglass and more rock resistant than carbon, but heavier, and the paddle shape is wrong.
My son has an atx. its made of heavy carbon, but it cost less.
the adjustable is god for growing kids.