My family and I have purchased 6 pair of KZFOO glasses over the past few months. It's probably saved me between $1000-$1200 from what we would have paid at a local retail establishment. We all have pretty complicated prescriptions (high index, progressives) and the quality of the KZFOO Premium Progressive lenses is excellent. They offer a up to a 40% wider view than standard progressives for less than $20 more. It's totally worth it. Their customer service is wonderful as well. The hold time is long, but the agents are very helpful. They're easy to work with and the return/exchange policy is straightforward.