"I am a regular user of anti snore mouthpieces and have tried most of those available on Amazon at one time or another. SilentZPro 2.0 has a design that works better for me. 1) it has a slightly different shape than other full sized mouth pieces so it fits better to the contour of my mouth. 2) It is lighter than most full sized mouthpieces but still holds firmly in place during the night making it more comfortable. It has been my experience that the most crucial step is in the molding. Don’t just stick the mouthpiece in your mouth and assume it will find the right alignment and fit. Use a mirror and make sure your upper teeth are centered and in the middle of the molding material. Place your bottom teeth as centered as possible in the lower tray before you bite down firmly. Some people will never be comfortable sleeping with a mouthpiece, some will get the benefits of a better nights sleep."