I have yet to read a negative review of a Buzz Kidder, though I don't own one.

If you envision a tartan kilt in your future a brown sporran is a lot more versatile for daywear, but on a Saffron kilt I do think black might be a better choice. And as already shown (Whidbey78, post #2 above), a black daywear sporran works fine on tartan kilts.