Be aware that this item has a hidden Beast Affinity effect.
This means that as a White Mage for example, casting spells on a Paladin with a Koenig Sheild (which grants "Beast Killer") you may get intimidated.
It's not a big deal IMO, since there is a limited chance of this situation, but is good to be aware of. I've had cures and even Raises skipped due to intimidation and now cary a spare neck piece if I am partied with PLD at events.