(I love this feat)
Quicker then the Eye doesnt give u an extra partial action.
Quicker then the Eye works just like the first level ability the Gladiator from S&F gains (improved feint).
Normal rules: For a rogue to sneak attack without flanking or the opponent without dex, he must make a Bluff check as a STANDARD action so that NEXT round he may sneak attack.
Rules with QttE: A rogue with QttE can make a bluff check as a MOVE-EQV action. That leaves him with a STANDARD action left which normally equals an ATTACK or, for example, a HIDE Check to try to escape.
The idea is that you move so fast that the enemy doesnt know what you were really doing (prereq DEX 19+).
This feat is great for Missile Weapons and if the Fighter is down and isnt helping you flank the enemy.
But its useless if your fighting creatures that are immune to sneak attacks (undead, etc...)