Late to the party. I know, but...
We always use thin, high temperature rated silicone under our pans when using the induction cooktop. They make cleanup easier and prevent scratches from our inherited cast iron cookware. After three plus years of use, our cooktop is scratch free.
I love that I can clean up spills and overflows while I'm cooking. It's almost impossible to cook something on to the cooktop.
We find that our induction cooktop reacts faster than gas to settings changes.