Not as good as the Superstar ones in my experience- the sintered ones didn’t last as long and don’t have the same power either, though they’re perfectly good. I did have one have most of the friction material fall off on one, which is ironic I guess since it’s supposed to be Superstar that do that. Certainly good enough though.
I guess it depends how highly you value performance, vs not buying parts from a known fud. But on merit the SS pads are definately the better option, in my experience. But I’d happily use either if the SS ones were unavailable.