rapala fish scales

We have a couple and haven't had any issues...once in a while we will weigh a new bag of sugar or flour by hanging it in a grocery bag just to check that it is still pretty close. Has been accurate on checks, but I usually just measure in about half pound increments, so it suits us.   

I've had mine for almost 20 years and no problems.

That depends on what your calibrating the scales for;  a BASS tournament or, bragging rights on FishUSA forums.  From what I gather your tap water is probably, by far, purer then that stuff purchased in them recycled plastic bottles.  Therefore your tap water would be a hair(red) lighter  10-4?
 
You gettin bugged by that stupid Windows pop-up since you re-installed Windows 7?  I've gotten two phone calls, yeah phone calls, about why I dropped "10".  Could hardly tell what the dude was saying he had such an accent so, I didn't understand his answer when I asked him how the (explicit) did he get my phone number.  I did understand him saying "have a good day, sir... click".

only had 1 scale from them and it never worked out of the package, returned it an got a different brand