This is my second pair of Kaenons. My first pair (a different model) developed spider cracks on the outside of the lens and Kaenon replaced the lenses under warranty (this was many years ago). I was happy with the performance of the lenses and Kaenon's warranty, so for my next pair of sunglasses, I decided to go with Kaenon again, this time the Burnet. I love the way they look and feel. The G12 lenses are initially amazing. Great clarity and polarization, especially on the water looking for fish. However, the durability is just not there. Several years into careful ownership, the outer lenses started delaminating and flaking off. I assumed Kaenon would replace them under warranty, but after reading Kaenon's warranty policy, they must've changed their policy because their warranty no longer covers delamination of the outer lenses. I assume this is a known issue, hence the change in policy. In any case, I ultimately decided to go with aftermarket replacement lenses (Fuze). So far they look great and we'll see how they hold up.