Easily read tire depth along the tire surface and the large LCD screen makes it easy to see. The air pressure part was a bit finicky. A 90° angle on the valve is required for reading, otherwise the reading will be uneven. You can set the unit of measure to inches or centimeters. Durability - based on a plastic case, don't put it on your keychain. I don't think it can withstand the impact of clinking key rings, it's better to use and store.