Reading my monthys i came across some 'black diamond brakes disks'

Im conciding getting some, with them been £190 for the front set im thinking slowly....

Friend of mine said their great for stopping but they rust real bad where the pads dont make contect with the disk :/ plus they eat pads as they are drilled and grooved but that i can live with.

Has anyone else tried a set? any good?

I just think they would look awesome with my black body work and red calipers hmmm