I've been to the dungeon once, though not with my main class (dps) but with my healer (item lvl 68).
Sad to say, but we failed because of me - I haven't played healer often and had my difficulties removing the seduction debuff through healing while keeping the tank healthy at the same time, but I'm sure an experienced healer would have had no problems there...
My main issue with the dungeon is the difficulty<=>reward comparison, because getting lvl60 gear for a dungeon that is close to not doable with a full group with item level between 50 and 60 is just rediculous.