I'd say it's only the first boss that's a challange, someone in the guild once mentioned it has everything but aggro dump and a double! Mainly the healer is the make or brake on that, as a healer I had such huge issues with it when we had to learn the fight. But once you get the hang of it it's a good way of tuning your resource management/trying out new stuff for a raid! And once you learn you can dispell the mean thing(took me what, 8runs to figure it out?<_<) it becomes just a cake walk.