We bought this cooktop locally, it was installed on June 27 and was used 3 times when it completely shut down in the middle of cooking dinner (June29)!  It has not worked since.  The Repair Tech came out and decided it needs a new circuit board ... which was ordered and due in on July 8 ... they plan on installing it July 11.  We have had to eat out or find other methods of cooking for the past several weeks .... I would not recommend purchasing one of these cooktops.  I have looked at the on-line reviews and have noticed that the same problem has been occurring with this cooktop for the past 2 years. You would think that LG would have looked into correcting the problem, long ago!