We bought a house that had them, no instructions or any advice was availalble. We have always had a, well, eclectic cooking set and we just used it.
Things worked OK, sorta, but we really hated cooking on those burners so we went out and purchased the regular burners. Don't know exactly the name for them but they are the ones with the black circuoar heating elements. When we sold the place we put in the sexy ceramiic ones but left other elements in the drawer.
Maybe we had a poor product and others are fantastic. And maybe we did not know what we were doing - that is not unknown.
The only advice I can give is that for folks who have them and are unhappy with them, you may be able to purchase the good old circular iron replacements. The ones we had just required pulling one out and plugging the other in, no difficult task.
Just our 2 pennies worth.