Well, look what we have here. A new trinket, avaliable from a 5 man, one of the top DPS trinkets around. Slightly better for dual weilders but you have to love it agianst rogues.

Real simple answers. [Shard of Contempt]

(found this, slightly modified)

Q) Is Shard of Contempt an upgrade over -

A) Yes. Yes it is.

Q) But you didn’t even let me finish!

A) I don’t need to. If you have to ask, it’s an upgrade.

Q) Is there any way it’s not an upgrade?

A) I can think of two situations in which Shard of Contempt is not a clear upgrade.
You have Blackened Naaru Sliver/Dragonspine Trophy, in which case, you really shouldn’t need to ask this question. I hope to god you don’t need to ask that question.

You’re already Expertise capped.

Q) I don’t understand Expertise.

A) Okay, you know those annoying dodges? How about parries? The ones that reduce your DPS and won’t go away no matter how many +hit gems you put in everything? Expertise makes those go away – not just on your white damage, but on your specials (which is why the Shard is so sickeningly good for Mutilate Rogues.) Until you cap it out expertise is amazing. It’s hit rating on crack. It’s old-school Weapon Skill with a side of good itemization.

Q) What about the proc?

A) 10%-ish proc rate, 20-second duration, 45-second hidden cooldown. So that’s pretty much nearly a 50% uptime rate for 230 AP. So yeah the proc is amazing, and that’s why this isn’t a gimmicky “let’s cap Expertise and stand in the frontal arc of anything that doesn’t cleave!” item. It’s just a winner and if you see one drop, stab the rest of your group to equip it.

Q) Is this useful for anyone else?

A) DPS warriors, Rogues, Enhance shammies, and feral druids can all get some good use out of it, especially the latter two with their lack of Expertise talents. But for the love of God, don’t let a hunter take it.

I have one, don’t you?