We Love Our GE gas 5 burner cooktop, but we were very disappointed to learn the hard way that the knobs are plastic. My Husband was cooking and the food started to burn so he slid the pan off of the burner and across the knobs and low and behold.... melted knobs. The knobs are actually the reason I came to this site in the first place, to try to order replacements.  Even so, the appliances I bought are really great and we are very happy with all of them.