How is the FG551 different from a regular air fryer?

It adds a wide grill grate, a closed lid and a temperature probe, so it can sear and cook to a target internal temperature. A standard air fryer mostly circulates hot air around a basket.

Do I need the probe to use it?

No. You can grill, air fry, roast, bake, broil and dehydrate with manual time and temperature settings. The probe is what makes hands-off cooking to doneness possible.

Does it fit a whole chicken or several steaks?

The grate is wide enough for a spatchcocked chicken or several steaks or burgers at once. It is not tall enough for a standing whole bird.

Will it smoke in my kitchen?

Fatty foods can produce smoke, especially at high heat. Trim excess fat, keep the lid closed and use a vented kitchen to reduce it.

Is the grate dishwasher safe?

Ninja advises hand washing the nonstick grate and bowl to protect the coating. Check the manual before putting any part in the dishwasher.

What comes in the box?

The grill unit, a nonstick grill grate, a removable cooking bowl and the Smart Cook temperature probe. Accessories vary by listing, so confirm before buying.