This oven is a game changer. I love the way it cooks & preheats quick. 4 stars instead of 5 because - It does produce a lot of heat when in use which makes the kitchen hot. I do turn down the ac when using the oven. I wish both ovens came with the slide out rack. I currently have the slide in the bottom oven for heavier pots. It would be nice to have one on the top as well.