Product review (5 stars): Better heat than radiant burners.
Over a month ago I purchased two of these because my one of my radiant glass surface modules cracked.  I was never happy with the heat I got out of the radiant cartridges.  These coil cartridges put out lots of good heat for searing meats, making big batches of home-fries, and boiling big pots of liquid.  If you do a lot of cooking at home you may regret getting the stainless version because it is a job to keep clean. Invest in an aggressive grit scotch brite pad to clean the surface and to restore directional surface finish.  Overall, I am happy with the purchase.