We "SHE" use the double racks all the time, and it cooks everything pretty evenly. This is our only cooking source as we do not have a oven in this 2015 Landmark so it gets used a lot. We are definitely very happy with it. The rear mounting plate was different and our rear vent in the slide wall was not installed right in the middle, so I had to do a little bit of modification to make it match up. That was a Heartland issue not a GE issue.
Happy trails
Jerrod