The oven works well in general, but squeezing 2 ovens into the same working height makes it very difficult to access the lower one. You need to bend way  down or get on your knees to check on the progress or remove the pan. There is a smooth sliding shelf which helps , but for prolonged use if you use that oven a lot, and you have physical limitations    ( folks over  55  take note) you may find this annoying or difficult.