I don't understand why this was moved.
You're not revealing anything, like where and how you get it, etc.
If you're using heavy armor, yeah get it, I think it looks great. And with some points in smithing you might be able to upgrade it and use it for a while.
I just got the nightingale armor last night, and don't like the looks of it. That face mask is disgusting, I think. But don't those boots have muffle on it, plus I thought it said you move silently? Or has my memory deserted me??
Personally, I do a lot of mixing and matching. I'm using heavy armor, but recently switched out the gauntlets and boots (I think) for pieces of light armor, because they both had a 15% increase in archery damage. Also found a ring with another 15% increase. So that's a 45% increase in damage that I can't turn down, the bow being my primary weapon.
I guess what I'm saying is, use whatever you feel will help you most, or what looks best lol.
That's the one thing I think is great about this game - freedom.
Good luck.