For those who don't know the mechanics if how they work, they're a LOT more difficult than normal heroics, they require a lot more CC and knowledge of your class, and rely heavily on group composition more than anything.
Your gear also scales down to 463 ilvl, so having a high ilvl doesn't matter and outgearing them isn't an option.
Soooo who wants to start on these suckers?? We can't let Apoth have all the fun! ;D