Summary: I purchased the ARROB636 during my kitchen renovation. I love cooking and wanted to have a commercial style range to aid in some of my culinary curiosities. I wish I could answer all of your possible questions but I will just tell you of my experience in finding a range. My parents have a Kitchenaid professional range that they bought about five years ago. It's a great range, sealed burners but high BTUs, I love cooking on it.