Product review (4 stars): How to solve burner shutdown issues!
I can confirm that some of these units are not working right out of the box.  Mine had problems immediately with burners shutting down as soon as the cooling fan came on and the sync burner function not working at all.  Some others have stated that a software update solves these problems.  Unfortunately the repair people were taking forever and ordering $1200 worth of parts under warranty to fix this unit.  I contacted GE directly and after working with them they sent me an update module as seen in the attached photo.  I plugged this module in and waited for the update to complete.  As soon as it was finished full cook top functionality was restored.  No parts needed and no waiting for them to be installed.  If you are having similar problems be sure to inquire about the software update!  Overall I am pleased with the performance of the cook-top, I just wish it would have worked without all the hassle.