Have after much back and forth decided to buy this instrument. At first me the price was a bit put off. Meanwhile, I no longer regret the purchase, however, and am pleased with the workload that I have this equipment. At first I have every measurement "measured it" because I could not believe that this device can quickly determine a so exact value. I must admit, my worries were unfounded. The measurements agree always 100% In interaction with the app for your mobile phone, rooms can be super fast measure and document the measured easily. So I praise me!