is this glass top simple to replace by a user or does it need to be done professionally?
Answer Dave, It is an involved repair, but nothing a "do it yourselfer" can't handle. We'll send you some basic information, and you can decide if you want to take on the repair yourself, or not.
Can I purchase only the glass without buying the entire cooktop assembly?
Answer Hello Harry. 318223640 is only the glass and the frame assembly. It is not the entire cooktop. If your glass top is broke, this is the part you will need. Hope this helps.