My jury is still out on this one.
I was surprised upon receiving it because in the pictures it looks like it comes with a case but it did not. Since this does go in and out of your mouth, a case would be a very good idea for it. Instead it comes with a rubber lanyard to hang around your neck that will tangle and pull your hair if it is long. It does not come with any directions in the tiny box so looking at the ad it says to boil for 20 seconds to help it shape to your mouth. That did nothing and I'm not sure exactly what it is supposed to form. It is not like a mouth guard that adjusts to your mouth. The piece is already shaped and firm with some give when pressure is applied.  It's kind of like a therapeutic squeeze ball for your mouth. I have a very small framed mouth , along with tmj and arthritis in my jaw. I am also a bad grinder. I hoped this would help alleviate some of my daily pain and pressure. So far it has only aggravated my conditions and been uncomfortable but I've only tried it one day so I will give it a little bit more time.
Rating: 3 stars