I really like the simplicity of use of this device. Push the button once to turn it on and push it again to take the patient's temperature. I also like the ability to switch between Fahrenheit and Celsius as I am old school and was raised on good ol' 98.6. The only issue I have with this device is that the reading can vary depending how close one holds the device to the patient's forehead. Too far away and the reading with be low.