Why I think its a good interface is -Â
It has a simple power on/off button.
It has a count down timer which gives continuous feedback of the time remaining.
Simple touch selection modes.
Digital display.
Temperature settings both in Fahrenheit and Celsius.
Lights on from start to finish.
Continuous visual feedback.
Current Temperature always displayed.
Clock available when timer is not counting down.
Ability to preheat.
Ability to select a shade of choice.
This toaster oven implementation while simple has a whole range of features embedded in it. It is designed for ease of use and user intuitive controls. Being simple in design, it makes sure that human errors are kept to a minimum. It also has controls that helps error handling (we can also decrease the timer.) The design strives for consistency and permits easy reversal of actions. This toaster has been designed by trying to adhere to the "Eight golden rules of Interface design" to the maximum extent.