You will be disappointed if you think this equal to induction cookware. It slows the cooking process somewhat. However, if you have some favorite cookware and you don't mind the slower process, I would recommend it.
The size I bought helped with several pieces of cookware I already own. This is my first induction cooktop, so there's been a bit of a learning curve to cook for 3 with varying diets and get the timing correct, but this item helps. I may shop for another as I learn my way in my more modernized kitchen and evaluate what might be useful . Instructional sentences were a bit odd but I interpreted.
Does exactly what it should: gets hot, translates that heat to aluminum cooking tools.
I've used it about a dozen times, and while it has discolored, it hasn't deformed.