I didn't. I heard about them from a teacher who'd gone to some sort of fair where businessmen showed the new inventions. He said it would cook a large potato in 4 minutes. We all laughed at him. My first one cost me just over a thousand dollars...and leaked microwaves. I didn't recognize that part til my son had a caterpillar in a plastic bubble (like the toy dispensers give out for a quarter now) and set him atop the microwave til he'd finished his lunch. Picked the bubble up and told me his 'bug' had fallen apart. At each segment.