I wish I had researched more thoroughly before I settled on this company for my retainers. Beware they only send you one set of putty so if you screw up you have to spend another $9 for more putty. Other companies give 3 sets of putty and they are less expensive. I had taken my impressions for the upper and lower teeth and received an email saying my impression for the upper wasn't good enough but that I would have to purchase another kit. For $284.80 for two sets, they should include more putty. I emailed them asking for a refund and was offered a "complimentary kit" to try again. I was away on a camping trip and didnt respond immediately because I had no service (in the woods). When I got back, I saw that they had sent me lower retainers anyway without my response. Then, they refunded me $244 after I said I didn't want them. According to them, the lower retainers were a "free gift". Guess what? They are loose anyway! They don't even fit. Free? No. I lost $40 for subpar work anyway. Do yourself a favor and do thorough research BEFORE settling on this company.