With this device you can handle superbly. Within a second, it has the result. A beep indicates that the measurement is done. (Who feels disturbed about it, but this can also leave.)
The Gentle Temp 520 is very reliable and easy to handle. Those who wish can storing up to nine values and look at the progress.
Especially handy, I find that the thermometer turns off by itself. So you may not always remember.