This gadget really works. Instant success. My wife is the judge. It takes a few nights to get used to but effectively holds your lower jaw in a similar position to when awake by anchoring it to your top jaw. By doing so it encourages you to breath through your nose, not mouth, which is optimal for your health and good sleep. I rarely write product reviews but thought this product deserved all the positive feedback. An inexpensive, non surgical solution to a problem that can be corrosive to a good nights sleep with one’s partner. Buy one. You won’t regret it.