Has potential
I actually ended up returning this product because it didn't fit me well. Also, when you put the guard in your mouth after putting it in boiling water it tends to burn your gums a little. I do believe that it could be a good product for some though, so I gave it 3 stars. If the mold had not been so tight on me, I could have slept with it as it did not take up a lot of room in my mouth. I was also very happy with the easy return process.
Rating: 3 stars