Paid Instasmile $480. They said my dental impressions were not usable because of shrinkage with the putty. I was told I had to pay $50 for more putty or $150 to quit treatment! I've tried MULTIPLE times to purchase additional putty but Instasmile doesn't accept calls from customers. Customers must schedule a "call back" appointment. I have scheduled MULTIPLE appointments, but they never call at the scheduled time. They have nearly 300 Better Business Bureau Complaints and thousands of complaints elsewhere. I wish I would have researched better. They are a COMPLETE SCAM!