I've had a couple of them for about 10 years and they seem to be pretty good. They're not perfect (as with most scales) but they are pretty consistent. I'm not sure how good they are on the higher weights but it's worked for me.

Todd

Team Boca Bearings - www.bocabearings.com
Smelly Jelly
Paycheck Baits - http://www.paycheckbaits.com/
Big Bear Fishing Rods - http://www.bigbearfishingrods.com
http://www.bassanglerprofiles.com/toddiwamoto.htm
www.geemoto.com