The oven takes a lot longer than the air fryer and does not produce the same crispy finish. I have tested extensively. For instance when we roasted a chicken in the past it was always in the oven. It took about 60 to 90 minutes. The air fryer does it in less than half that time for well less than half the electricity cost, and it tastes so much better. Our chicken is now like the woolies ones. Crispy on the outside and very juicy on the inside. I cannot go back to the oven for cooking certain things. Anything like chips, crumbed chicken, fish, and many other meals come out better in the air fryer, take less time, and costs me less in electricity. Whats not to like? The oven we mainly use for baking now and Pizza's.