The OP asked for "protection from stun" which is exactly what that item gives: immunity to being stunned. If you are looking for ways to stop being stunned once you already are, then that is entirely different.
This item requires you to play with a little foresight obviously, but since it is a swift action and lasts for at least a couple of rounds, it can still be very valuable. But your mileage may vary depending on your tactics.