Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Great Lens, Great Value

I have bought a series of nice sunglasses over the years and I am glad I have come back to Serengeti. My Bolle's had a coating that would come off after a year. They replaced one pair for free but I got tired of sending them back when the second pair did the same thing. Serengeti's lenses are not coated so they might scratch but they won't have a layer of color peal off. These glassed have great clarity and a light comfortable fit.