So, we aren't new to the world of gags and BDSM. This gag is a lot narrower than our other "introductory" toys, but the dildo is longer than expected. It legitimately touched my uvula when properly tightened down.

No strange smell or taste, the silicone is very neutral in those areas.
It's firm but not unyielding in stiffness, you would be hard-pressed to bite through it (though I plan on giving my wife a reason to test that really soon!)
It is NOT great at actually silencing the wearer, it's too narrow.
The locking feature on the buckle should be fun to play with as well.