I bought this to replace an electric cooktop. I thought we could just swap them out. Good thing I called an electrician because he needed to run another wire from the panel in the basement and told us it could've started a fire if we just switched it out on our own. It fit perfectly in the existing opening and I used it tonight for the first time. We had to buy new cookware that was induction ready. I couldn't believe how almost instantaneously the pan started cooking the food. It took my husband a few times using it to get used to.  I absolutely love it! Can't beat the price either! It's also nice that I don't have to clean under any knobs anymore.