I'm not thrilled with that answer. Perhaps a modification to your advertising is in order.
I also was excited by the ability to measure items in the image using the edit feature, but after testing it I found it to be dangerously inaccurate and full of bugs.
The one nice thing that it comes with is a calibration target made up of a grid using 0.1mm spacings. This can then be used as an overlay on a captured image in order to obtain accurate measurements. Though I'm an EE and a "normal" customer, I'm using the microscope for petrology initially - studying the weathering of granite. It's the best value around. Large image, adjustable (dimmer) LED lighting, and easy to install.