I never thought an appliance from the Internet that I had to mold myself would help me sleep better, but we 0 I was desperate so gave it a try. I purchased the ZQuiet Advanced because I needed one with no contact to my front teeth. It not only has resolved snoring, but resolved teeth grinding and sleep apnea! I had a new sleep study done after a few months of wearing it. My episodes went from 14 per hour to 3. I was advised to move the straps though #2 or #3 (if I can handle it) to see if that brings it to 0 episodes. I need to get the courage to do that (remove factory installed setting and replace because I don't want to break it.) I have had insomnia for years. It has helped some but I could use a lot more help, so who knows, maybe if I move the straps it will help more. If so, I will write another review! Oh. Additionally Lindsey in the Customer Service Department is amazing! It is a blessing to be a patron of ZQuiet, a company with a good product, great prices and excellent customer service. Thank you ZQuiet!♥️