This cooktop is very powerful - boil water in less than 2 minutes and big pot of soup in minutes.  But need to very careful with the control panel.  Just some spill of water will shut off the cooktop, and took minutes to come back up.  Last time my soup was over-boiled and soup spilled over the control panel.  The cooktop was shut off and showed E9 error.  After 2 days, it's still not working.  I called a technician to take a look, and when he came after 2 days, it worked again.  If possible, I will choose one with knobs instead of touch screen panel. [This review was collected as part of a promotion.]