How big is the 6-quart basket in practice?

Six quarts fits roughly a 3- to 4-pound chicken or fries for a family of four. It is a single basket, so you cook one batch at a time.

Does the viewing window really help?

Yes. You can watch browning through the window instead of pulling the basket out and losing heat. It is one of the features that sets it apart from most basket air fryers.

What do the five presets do?

They set time and temperature for air fry, roast, bake, broil and warm. You can still adjust manually for foods the presets don't match.

How is it different from an oven-style air fryer?

It is a pull-out basket design, which is easier to shake and clean than racks. Oven-style models usually offer more capacity and sometimes two zones, but take up more room.

Do I need to preheat it?

A short preheat helps even browning, especially for frozen foods. For small batches you can skip it and add a minute or two to the cook time.

The basket and crisper plate are removable and nonstick, so they wipe or wash by hand. Check whether the parts are rated for the dishwasher before relying on it.