Very useful in the household business where dimensions are constantly being measured and checked in both imperial and metric units. The Quantumike has a faster propeller than most other microphones, so you can take measurements faster. Because of its accuracy, it is necessary to check the zero point and clean the tips from time to time. I find that using a single piece of paper and covering the tips on the paper is a very effective way to remove liquid or chips from an anvil. It's amazing to measure things to within tens of thousands without too much drama. Yes, it can be done with many old micrometers, but this device has very good image quality, which is useful in poor lighting and eye tilt. It is very convenient to switch from imperial to metric at the push of a button - no more miscalculations. There's only one thing this device could have improved, but luckily for all of us, that's an easy fix. Just buy a micrometer stand. The boy does, which makes things even easier. It keeps your hot hands off the microphone to keep your measurements stable in many ways.