In general, the tool is not bad, it measures exactly as accurately as stated - ± 0.03 mm and not a thousandth better. Don't even look at its "resolution" of 0.01mm. The zero point sometimes shifts up to 0.05 mm, but for such cases there is a reset button. The interface is convenient, but it is difficult to make it bad. The battery cover is very disappointing. To replace the battery, you need to remove a small plastic cap with a reverse contact, which is held on by two very short screws. It takes a LOT of effort not to break the thread. Why not do it on a regular snap-on latch is a question. If the thread breaks, then contact with the battery is lost and the entire tool turns into an expensive heavy ruler. If you are an engineer and you need a really reliable and accurate tool, it is better to invest in something more expensive. I bought it to take measurements from everyday objects and make models for 3D rendering, plus domestic use.
To give a better sense of my experience, I've included some pictures.
Gaming chair AeroCool Baron, upholstery: imitation leather/textile, color: steel blue
35 Review
Accurately Measure Angles And Levels With GemRed XVB Digital Gauge Level Box For Pipe Conduit
25 Review
Laser pointer Green Laser 303
31 Review
Thickness gauge CarSys DPM-816 PRO (Fe/nFe)
31 Review