microwave/convection oven combo

When I use the microwave portion of my combo, I follow normal microwave rules. I use regular oven cookware for the convection part. I must say I had many issues with the RV brand that came in our 5th wheel and had it replaced 3 times under warranty. By the way, you do not get a new warranty with each replacement, just the originals one. We finally gave up and installed a GE model that was an exact fit. It works much better and I have not had any more issues. When using the convection portion, just keep an eye on your food. I find that some things cook faster and some need more cooking time. My GE automatically reduces the selected temp by 25 degrees on convection bake.