Depends what you want it to do, since 2.0 it not possible to auto-unlock lockboxes for you, http://ui.worldofwar.net/ui.php?id=3904 is an updated Easy unlock that removed all the fluff that doesn't work anymore, and just adds a button to your trade frame that triggers the unlock spell. You just have to click the button, then click the lockbox and you're done. And that's about how good it gets.
Been using it a while, works a little differently than easy unlock, but still excellent. and minimalistic, which I am a HUGE fan of. (since my poor wittle 2 and half year old mac laptop is a bit.. sluggish.)