I have to add my 2 cents! I have an air fryer and LOVE it! When I make fries - white or sweet potato - I cut the potato up, shake it with a little olive oil and whatever seasonings I want and put them in the air fryer! I think they are fabulous - actually taste like potato! We did a taste test - my husband thinks he is always right - he fried fries and I air fried fries - he admitted mine were much better! We do things like onion rings, mozzarella sticks, quick stuff like that. We use ours more when the grands are here, but I love it!! Never did donuts - not sure how that would work?? Maybe I should try it today??