The thermostat allows the automatic control of the temperature in the waffle iron. However, the "Twin-O-Matic" also has a thermometer -- a device that indicates the actual temperature of the iron. The principle behing the thermomenter is basically the same - a bimetallic strip is made with the property that its warping is a linear function of temperature. This strip is connected to a lever mechanism that causes the small needle to rotate. Hence, the position of the needle is a direct function of the temperature. The dial is calibrated to reflect this.
Finally, beyond the structural superiority of the All-Clad's waffles—their lovely architecture and delicate texture—there was one more winning factor that pushed them over the top: they just tasted better. I can't explain the chemistry behind it—as I said, we used the same batter for every test—but the waffles from this machine seemed to have nuances the others lacked, like apparent notes of vanilla and caramel and a toasty depth of flavor. They tasted like $200 waffles.

The best waffles are obtained by using yeast for the dough. You can also use self-raising flour or baking powder, but the result is not as tasty. Alas, waffles with yeast cannot be stored for longer than one or two days. You should eat them during the baking or as soon as possible afterwards (warm them up in the iron which was used for the baking).

Like most electric waffle irons, the Cuisinart WMR-CA waffle maker isn't meant to be submerged, and the waffle plates are built right into the machine, so you can't remove them for a good scrubbing. Surprisingly, removable plates are relatively rare, especially in the American/traditional waffle maker category. But the Black and Decker G48TD (Est. $40) has them, which makes it very convenient to use. Not only do the non-stick waffle plates pop out for easy cleaning, they also have a completely flat reverse side (also non-stick). Flip the plates to their flat side and open the G48TD's lid all the way, and you have yourself a mini griddle for cooking things like pancakes and bacon; or close the "floating" hinged lid and use it to toast sandwiches.