Love it! Acharthite is my fave. My winters are the 1.2s 15x7, in flat black. You did a brake swap, correct? How does losing all of that weight feel diff over stock?
My wheels are actually High Power Silver lol, the pic does kinda make them look grey tho.
I have the Stoptech BBK not the Wilwood BBK so it doesn't lose as much weight as the Wilwoods since the Stoptechs have a beefier rotor and caliper. But I can tell you this, I didn't scientifically weigh them but when I did pull the rotors and calipers out of the box I didn't react negatively to the weight or acknowledge it tbh like you usually do with rotors.
tl;dr
The Stoptech rotors and calipers are, if not lighter, the same weight as the stock brake setup I feel.