The original Cuisinart was peak interface/appliance design.

Two perfect paddle buttons.

One for ON that catches and stays down for continual operation.

And one for PULSE/OFF that does exactly what it says. It doesn't stay down, it returns to reset when you let go. Hold it down as long as you want to pulse. Let go and it stops. Or just push it down to disengage ON, and turn it off.

The description may sound a bit convoluted because of the dual purpose PULSE/OFF button, but when you use it it's absolutely obvious. And couldn't be better.

Big flat toggle buttons under satisfying tension. Clear affordances. You push them down, not in. One click catches, one doesn't. You can use them with bare hands, oven mitts, fingers coated in slippery whatever. Doesn't matter. Plenty of surface area.

Outstanding design. It's all been downhill from there.

-Jason