I absolutely hated it!
I've been wearing night guards for several years due to excessive grinding.  My last set was starting to irritate the inside of my lower lip, so I thought that this item would be perfect, since it isn't bulky in the front part of the mouth.  I got it, and was excited to try it.  When I put it in to do the fitting it seemed to fit fine as it was, but the part that is supposed to go around your front teeth didn't seem like it fit great, but the packaging says that it reacts with your body heat and forms to your mouth shape after a few minutes, so I didn't think much of it.  I used it the first night and I kept waking up because the super advanced, body heat reacting band that is supposed to fit so well kept getting loose and wrapping around my tongue, and the pivoting plates were too high against my gums, making it rub where my lip meets it. I figured that maybe I had adjusted it incorrectly, so I tightened it up and gave it another shot the next night, and the same thing happened.  The next morning my naughty dog got it off my bed stand, and I just threw it away.  Don't waste your money.
Rating: 1 stars