Here's my mouthguard story. I had been in favor of mouthguards but didn't feel it was something for me. Then in a varsity game last year I took a foul straight to the jaw. I was stunned, but tried to play it off. I immediately threw another ball to the pitcher. Then put the ball in play and start into my squat. My partner comes running up the line calling time. He comes up to me and asks if I'm okay. I tell him yes. He points to my mask which is almost all the way to the backstop and tells me he really thinks I should think about putting it on befor putting the ball in play. I never realized I wasn't wearing it. I was fine the rest of that game, but had a dull headache for a few days. I diagnosed myself with a mild concussion. 

Back to the review...

I ordered this mouthguard for a few reasons:

1. I thought being that it went over your lower teeth it would be less visible.
2.  It is advertised as allowing foe more natural speaking.
3. Shock Doctor has a great reputation and I expect high quality products from them.