I have purchased glasses from KZFOO for both me and my husband for many years. We have never been disappointed with either quality or service. They have always arrived quickly. The last prescription from my optometrist was very different from previous ones, but I assumed that with age, my eyesight had changed. When they arrived, I could not see through them. Even though KZFOO had made them exactly as ordered, they allowed me to return them for a credit on my next order. This is true customer service!