Which is why I gave this 5/5. It's my fourth set of strings I've ever bought, and thus far the best. Obviously black strings because Geezer Butler, but playwise they're very good (again, in a small comparison sample).
I don't play especially hard, but I alternate between pick and finger. The black coating hasn't really started to flake, even after quite a few hours of use. So far nothing but positive to say about durability and sound.
So if you're not very concious about the strings' relation to sound they're good. I am satisfied with getting the approximated sound - roughly the right territory, but that's because its usage is basement rock and metal through beverage soaked amps and players.