My first ZL was the SC51 and it is perfect in every way. Clean LED, flawless finish, and works exactly as advertised. Then I got a SC60w. Same thing. Perfect. That warm tint is really something. Tre definitely had some bad luck with his and I hope if he replaces them, the next lights will be perfect too. I guess all manufacturers suffer the occassional "quality control" misfits, but I don't think Zebralight is known for bad quality control. I don't know how long they've actually been around, but they make some really fantastic lights in their price point. Anyone who doesn't have a ZL owes it to themselves to get at least one, and see for yourself how nice they really are. Like I said, the two I have, I couldn't be happier with, and I plan on getting more as money permits. :twothumbs