I bought a 4-quart air fryer for $120 and it is amazing. I've cooked chicken, hot dogs, potatoes, bacon and grilled cheese sandwiches and they all came out great.
I use mine everyday. It gets more use than my microwave, or traditional oven. The air fryer is a real game changer for a person who cooks a lot of meat, and lives a busy lifestyle.
I would recommend that one purchase the kind that is styled more like a toaster oven, than the kind that has you cooking in a weird bowl type thing.
Why not just get a convection toaster oven instead?
After all, "air fryer" is a misnomer because it doesn't fry anything. It bakes.
It's just an expensive tiny little convection oven with no window to see inside. And you can only use their proprietary overpriced accessories in it because your regular cookware won't fit into it.
But hey, they advertise the fuck out of it and pay famous TV chefs to endorse it and use it in infomercials. So it must be good, right?