I have the same levers as you, except my adjusters are also black, and for under £24 I think they are great. Look, and feel, so much better than the stock levers and they have much better adjustment. I was never totally happy with how the brake lever felt, it's travel, with the OEM lever but with these it's exactly how I want it.
As long as they don't fade in the sun, I have heard stories, I'll consider them money well saved over Pazzo's. Of course if the brake lever ever snaps at speed so I can no longer brake then my zombie will head to China and get revenge.