https://www.youtube.com/watch?v=glIknPywSmM
https://www.youtube.com/watch?v=glIknPywSmM
All my leather pieces are Shadowed and my sneak perk is at lvl 2 right now, and it does work. Especially when it's either dark outside or you stick to the shadows. I will go in 'caution' mode, but half the time, people really can't see me and I go back to hidden when I don't move.