We've only been cooking with this for a week, but all we can say so far is "wow!"  The burners light promptly, the burners must be tuned to deliver high heat, because the burners are much hotter than our old gas model.  The low (simmer) works great, without flickering.  Plus 6 cooking zones on top, two ovens, all in a 30" space that looks great.  This is our best deal ever, thanks.