Product review (5 stars): Perhaps the World's Greatest Electric Cooktop
We have had our Caldera cook top for 8 years. It still cleans up beautifully, keeps temperatures just where they are supposed to be, cools off reasonably quickly (and has a light for each burner to tell you when it is still hot), and looks elegant.  We have ours sunk into the stone, and it makes a perfectly seamless top, with no place to collect dirt or grease.  The shape is wonderfully functional, eliminating the need to reach directly over hot things.  The controls are simple, clear, and flexible (want to do a heat at 6.5 rather than 6 of 7, you can do it).