The fact that it looks awesome and you become a Dragon breathing fire all over the place...

I have it but I'm really not into looking like a strange chain mail wearing cathedral dude with a nasty colour scheme you can't change with shaders. Perks are ok though but If I could give you mine I would. I like the Voidwalker class better however, the voidfang vestments is also crappy looking and looks like a set of 70's curtains. I still think the Astrolord robe and the new vanguard gear are the best aesthetically.