I've used a microwave which has one dial. You can turn it clockwise or anticlockwise to add/remove cooking time, which is fine.
The designers thought it'd be good to allow pressing the dial, as if it was a button. Pressing the dial set the cooking time to 30 seconds and immediately started cooking. A one-touch interface, how useful!
The only problem was that it was difficult to press the dial without accidentally nudging it clockwise or anticlockwise. Nine times out of ten I managed to turn it anticlockwise, which set a time of 95 hours or thereabouts - and began cooking.
I hate to think what may have happened in some people's houses where they've done this, not noticed that it said 95 hours and forgotten it was cooking.
The designers thought it'd be good to allow pressing the dial, as if it was a button. Pressing the dial set the cooking time to 30 seconds and immediately started cooking. A one-touch interface, how useful!
The only problem was that it was difficult to press the dial without accidentally nudging it clockwise or anticlockwise. Nine times out of ten I managed to turn it anticlockwise, which set a time of 95 hours or thereabouts - and began cooking.
I hate to think what may have happened in some people's houses where they've done this, not noticed that it said 95 hours and forgotten it was cooking.