I love this double wall oven. The top is convection and bottom is traditional. I don’t use the convection often, but wanted it should the need arise. One rack has a sliding feature which is beneficial. Oven lights are really bright so i. An check on the food without opening the door. It preheats quickly and I love having it connected to my iPhone so I can preheat the oven on my way home, or set a cook time before leaving.