Thank you for the data. Good to know.
The visual representation gives a feeling that it may not be as accurate as it is. However, the large display is very nice and easy to see. Some tuners have a needle that moves and when it's in the middle there is another indicator that gives a nice visual to indicate you are in tune... This has nothing to do with the actual accuracy but a good visual can help with confidence of the user.
I'm confident now that I know the accuracy...