Asking to a pro if Air fryer worh buing he said: "think about professional kitchen. If you found something in a restaurant then can be helpful even for no pro. But I never ever saw air fryer in a pro kitchen. It s Just a low quality Owen. Just marketing. If you have a good Owen you dont need air fryer"
An air fryer that does a good job can be had for under £100. Show me a pro-level oven in the same price range and I'd buy one of them. As it stands, I use the air fryer.