The seller reached out to me and gave a full refund of this product (even though I had used it once). Since the costumer service was fast and courteous, and I'm no longer out money on something I can't use, I added two stars. I still wouldn't use this product, but would recommend Difiney as a company. If you want to give it a try, it seems like they would work with you to make things happen. Original Review: I have an average to large mouth. My lips have to stretch and strain to barely close over the device. Since it holds my jaw open, I also cannot form a seal with my tongue against the top of my mouth. This prevents me from breathing through my nose and forces mouth-breathing! My sleep was horrible, and I woke up with a dry mouth and a mouth sore from where the upper tray rubbed as I struggled to keep my lips touching each other. This was all on the "1" setting as suggested to get used to it. I only gave it two starts because it did easily mold to my teeth properly the first try. But seeing as it caused me to mouth-breath and snore, it was far worse than sleeping with nothing. I would not recommend this to anyone and wish I hadn't wasted my money on something that did not meet any of the expectations set in the product description. Unless you already mouth breathe and are happy doing that, please do not try this. Read more

Wife is a light sleeper and I’m a hard snorer. I was reluctant, but it has helped tremendously. No more waking me up to roll over! It does take some adjusting to the feeling of it in your mouth. It’s kinda bulky, but depending on your comfort level and how hard you sleep, I don’t periodically wake up feeling it much at any more. I will buy again when this wears out. Read more

I was honestly skeptical at first, but the Difiney Advanced Anti-Snoring Device 4.0 has completely exceeded my expectations. After trying several other solutions with no real results, this device finally delivered. It’s comfortable to wear, easy to adjust, and doesn’t feel bulky or intrusive. Within the first few nights, my partner noticed a huge difference—no more loud snoring, gasping, or restless sleep. I’m also waking up feeling more refreshed and rested. I appreciate the thoughtful design and the fact that it stays in place all night without causing jaw pain or discomfort. The included storage case is also a nice touch for hygiene Read more

I've been using this Difiney advanced anti snoring device every night since I bought it a few weeks ago. It was easy to mold, with the boil-and-bite method. It's a bit bulky but not overly annoying. But trying to advance the lower portion with the push-and-slide hinge was very difficult. I try to keep it set at 3, and it worked for about five nights. But now, when I wake up, the device slides back to the initial position. My wife says it did help with less snoring initially, but now it does nothing. That's because the hinge is not durable. If you bite down on it while sleeping, the hinge now moves. It's a poor quality build. If you can get the hinge just stay in place and lock there, it would be a good device. But as it is now, it's buyer beware because this thing doesn't work after a week or so. It's my fault I didn't keep the packaging or I would return this waste of money and get a refund. UPDATE: I was able to get a refund, so I added a star to the review. Read more

I tried it for half a night. No clue if it helped with snoring. If a painful jaw and a mouth drier than the Sahara are a reasonable trade off for snoring, go for it. I woke up half way through the night so uncomfortable. I had it on the lowest setting, but the thing is soo bulky I couldn’t even close my mouth to swallow. This thing went straight into the garbage, as I could not see retuning it after making it fit my teeth. Only plus was the instructions were easy to follow, and getting to match my bite was easy. Read more

I have been using the SnoreRx for a couple of years and tried this new option which was cheaper and looked very similar. As a female the SnoreRx was a bit too big for my mouth but I could tolerate it and it did the job. The Difiney is surprisingly more appropriately sized to a smaller mouth and so much more comfortable. Adjusting it to the appropriate number was not easy as it was hard to get it to slide. But perhaps it will not slip as much over time. I set it to the same number as I used for the SnoreRx and had no issues from the first night of use and SnoreLab and my husband confirms that it works. Best anti-snore device I have tried Read more