Product review (3 stars): Radiant cartridge. Beware of pot and pan sizes (8-7/8" or less only work)
I had to return these as I couldn't put a pot or pan larger than 8-7/8" round on it. You are quite limited in its use. I have quite a lot of professional grade pots and pans that wouldn't even touch the glass portion, and you can't heat anything if you don't have proper contact with the element regardless if it is radiant element or a solid element.
I would have had to buy quite a lot of new pots and pans and decided I would go back to what I had. Raised solid elements from when I got the stove back in 1992.

Amazon refunded me in full on this purchase.