I am middle aged & have moderate Snoring & apnea. Also, I have weak bottom teeth. I have been wearing dentist-made expensive MAS snoring devices, and online made MAS devices for 15 years. They are tough on bottom teeth, and the back jaw-joint, ..... and the back jaw mandibular muscle. If you are young, it not so much a problem. If you want something more gentle, (if your are older in age), this snoring device (SweetSleep) holds the lower jaw in line with the upper jaw. During sleep, one's lower jaw slips back 0.5 cm (it causes the tongue to slip back into the throat!) ..... (Not great). This extra "tongue and jaw", .... normally goes back, into the "back" of the throat. SweetSleep gently stops this. It is made from a soft comfortable plastic-gel. It's easier on the teeth and Jaw muscles. My bottom teeth and lower jaw are not stressed out by this design. It is good for mild to moderate snoring. Nonetheless, I am pleasantly surprised, and happy with it gentle effectiveness.