No experience with them. But without doing any research on the product, I would be concerned about them using the term, "chips". Our cars will NOT allow the replacement of chips. However, the ECU CAN be reprogrammed to provide better power and fuel mileage. Several vendors, that provide this service, are sponsors of this forum. To locate them, click on the small black print, "Supporting Vendor List" located in the middle of this page...about an inch and a half form the top.
Oh, I did locate some info from the GF website. Their product is stated as a "plug-in" with 2 small wires. The members on this forum have discussed this type of product before....WITHOUT much appreciation.
You might want to check this website also. Can't verify the accuracy, however.