I've never used the AddOn myself while raiding because, well, I don't like to be told what to do in the sense that AVRE does.
However, I was thinking of installing and using it, to draw in Dalaran, and see where that takes me until the next minor patch :P
I'm also glad, on another note, it's taking it's leave because Ruby Sanctum is coming, and I'm excited to do the encounter with little to no boss mod AddOns
That is the best I MO, experience it first hand, without boss mods, because well, no one really does know the fights yet, now do they? At least, not the general public of WoW, maybe just DBM in the PTR or what have you....
...I'm babbling...