This thing has been life changing. I've been grinding my teeth - HARD - for 30+ years. Headaches, jaw pain, broken teeth, inflamed gums - I've got it all. When I saw an ad for Zerene, I was intrigued, but honestly a little put off by the idea of having something sticking out of my mouth all night. I thought about it for quite a while, but finally decided to give it a go, and....wow. Just WOW. It took me exactly one night to be completely accustomed to the tube. The readout for that first night was sobering - yeah, I grind hard. And I grind all. Night. Long. Rather, I should say, I USED TO grind hard all night long. As I write this, I've worn the Zerene right around 50 nights, and the improvement is almost too good to believe! Not only do I grind less; I grind more gently. And I'm just getting started! The customer service has been incredible too - my coach is super responsive and helpful. The one time I had a problem, she responded right away with an easy fix. If you're still on the fence like I was, trust me: it's worth it. If I'd had this thing years ago, I would have saved many thousands of dollars in dental work.