I have had the cooktop for about 4 months now, and love it.  It heats faster than traditional gas or electric, and when the temp is turned down the results are almost instant.  If something does boil over, there is no scalding mess, because the glass isn't heated by elements, and the glass makes clean up much easier than a gas range.  When I show someone the cooktop, I always put a pan of water on the top and watch their amazement when the water starts to boil in less than a minute.  Then I remove the pan and set my hand on the top where I heated the pan, its crazy you can do this.  I feel much safer with the grandkids around when we are cooking.