I am on my third Snorex mouthpiece. It is a very good product, well-constructed and easy to customize. I have been pleasantly surprised at how comfortable it is in my mouth and I notice the flow of air over my palate that helps me fall asleep and sleep more soundly. Of course, the greatest benefit of my Snorex is the peace it has given my long-suffering wife. She is able to sleep more soundly because of its salutatory effects. That means the most. I guard my Snorex jealously from our puppy who seems to have a laser-like attraction to it's texture. She was responsible for stealing my second one off my nightstand and chewing it to pieces. Never again! I am very appreciative of the quality and effectiveness of Snorex's products.