It heats up really quickly but i have an issue with the shelves, they only just seem to fit. on my old oven the shelves slid in and out quite easily on a ladder type bracket that fitted to the oven walls. These shelves sit directly on the bumps in the oven sides. my shelves are a wrestle to fit. Even after using once the shelves look as if they have scratched the walls of the oven. And what is the point of half a ledge in the oven. All you need is a balancing challenge when preparing a family meal.