Design and operation of the instrument ok, but unfortunately Kostruktionsfehler: Without flashlight ad practically even with the best lighting or daylight can not be read. Had I bought the scale as a replacement for the almost identical level of TCM, which turned out, unfortunately, after many years with a defect in the electronics and is no longer being built. The display of this scale is very small, unlit and was structurally withdrawn a few millimeters into the case. The result is fatal: the ambient light needed can only directly frontal incident. Since you also should have free hands for weighing usually better recommended instead of a flashlight even a headlamp. I do not completely unclear how one can construct so flawed and give no test in the sale. A backlit display per device would cost perhaps 5 cents more in production. How is better the TCM model had shown us - large display and also in dimly lit conditions no problem.