The measurements are quite accurate.

Excellent, recommend for any string player to have to make the right sting height measurements

Very precise and clear measurements in standard and metric

Hence the desire to purchase a string instrument action ruler that lays across the frets for a consistent measurement

Has some pretty sharp edges which may scratch things if not careful, but the measurements look accurate to me, and are pretty easy to read when looking perpendicular to a guitar neck.

It has numerous measurements and recommended string actions for bass and guitar which were helpful

The contrast on this guage is not as good as in the picture, making the gauge difficult to read at a working distance