I think this is a great O-ring gag but could use one improvement. The metal O-ring is very sturdy yet soft enough to be easy on the teeth. This gag is very comfortable to wear even for longer periods of time. The ring is not too large to make the wearer's jaw sore and has about a 1.5" inner diameter that might be used to place things through. The strap is comfortable, seems durable, and is also made of silicone. I like how the latch can be locked, a thoughtful addition, however...

The wearer can easily undermine the gag. My only complaint is because of the thin lines of silicone connecting the ring to the strap which allows the ring to spin in the gag wearer's mouth. If the ring is not held in place with a firm bite by the wearer, it is prone to flipping horizontal, allowing the wearer to close their mouth. I think this design flaw could easily be fixed with a thick band, similar to the strap, instead of a thin string of silicone connecting the ring to the strap. A band would help stop the ring from rotating in the gag wearer's mouth...

Being mostly silicone and metal, this gag is very easy to clean. However, there is a discontinuation of the silicone between the O-ring and strap. Drool, soap, water, etc., can actually get between the silicone and metal of the ring holding the gag to the strap. The silicone does not taste or smell like anything and feels great.

I'm going to try to modify the gag to get around that one design flaw. If not for that, this gag would be the perfect O-ring gag, and I'd give it a five-star rating. Unfortunately, unruly participants will easily defeat this gag resulting in a bit of disappointment.