Lynx Levelers -- 10-year warranty ?????

I know I will be opening a "can of worms" but here goes anyway. I need to replace my system of leveling blocks. I have used wood and the yellow plastic blocks. In all cases I’ve had problems with cracking. I am thinking about Lynx Levelers and depend on their 10-year warranty to replace any broken blocks. I am concerned if I have to pay for shipping that the warranty may not be worth the trouble and aggravation.

Has anyone had experience with filing a warranty claim after the first year?