The worst model of this i used only had a single set of + and - buttons. Then a single selector-button for which area of the stove you wanted them to control.

The worst model of this i used only had a single set of + and - buttons. Then a single selector-button for which area of the stove you wanted them to control. Have fun cooking with 2 zones, any time you need to adjust the heat of the next zone you need to press select 3 times to circle the whole stove and then adjust several times with plus or minus. Add the mandatory touch-delay to each action and by the time you reach desired temperature your food is burnt already. How can anyone think this is a good idea?!