As has been said many times now, this is a great fight. It's hard as hell, requires top-notch gear and intense execution from the entire raid group. Before AQ40, I wondered how Blizzard was going to really challenge raid groups, and whether it was still possible to design fights that would tax the mana reserves of BWL-geared healers. I'm glad to see that I was wrong.
This is a fight that will be fun and profoundly stressful as a healer for a long time to come.
~Kaubel edit~
We died a lot this past weekend before getting them on our second try last night.
First thing you see after running into the room:
(spoiler)
Ouro (spoiler)