No combat effects, shielding, spell shield, avoidance, accuracy, stun resist, strikethrough, DoT shielding, or Damage Shield, or Damage Shield Mitagation, None of these things are affected with this neck piece. I bought this trinket for those things as they were stated here on the site. It DOES have the heroic stats, AC, resists, HP and Mana regen, Heal amount, Spell Damage, and Clairvoyance.
I'm not at my cap at all on the first items listed above and there was no change at all when placing the necklace on. Oh, and the level requirements are correct.
All in all I am very disappointed with this trinket due to ZAMs description of it. Thanks, guys. I could've gotten something better for about 200kpp less. Thanks so much!