I purchased this product on 12/26/18. It woked well for about a year then it had multiple problems. Last night it overheated for the second time. It was so hot it scorched a stoneware pizza disc and it displayed code C-21 (abnoramlly hpot oven). The pizza disc was so hot it melted an oven mitt I used to remove it form the range. I've contacted Samsung support but this doesn't seem to be an isolated issue. It realeased toxic fumes similar to when a self clean cycle is run.