Product review (4 stars): This Frigidaire fit in easily. Installation was simple and straight forward
This review is for the Frigidaire Model FGGC3047QB.  I say that because I am seeing a lot of reviews attached to the wrong product.

This was bought to replace an old 1998 model GE cooktop.  The old cutout was 19 1/2" by 28 1/2".  This Frigidaire fit in easily.  Installation was simple and straight forward.  However, I dinged it one star because of the tie down.  My countertop is 3 mm granite.  The tie down connection on the cooktop is for a thinner countertop.  So, the unit is just sitting on the countertop in the cutout.  So far, it is not moving around and is working just fine.  It lights easily and functions well.