The sun was purchased to replace a 30 year old oven that was not functioning. We were pleasantly surprised to find that in the last 30 years technology has advanced so much that the inside of the oven is much larger than it was on the old oven. Standard baking sheets can fit in here.  The new design is also easier to keep clean because the heating element is on the top.  If there were to be a spill it would be much easier to wipe up.