I really wish I took the review more serious. After like two months of sending the initial trays back and forth, I finally got my retainers. After the 5th set I realized that my front tooth simply was not shifting, I had never had crooked front teeth so it actually made me look worse. I reached out to customer service over and over and never got a call back. That's what I get for paying up front thinking I would save some money. Anyway, don't do it. It doesn't work
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