Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This unit is worthless

I bought this unit a few years back. Worthless at best! I wish someone - even the mfg could come up with some kind of solution to retain the heat with these units. I called their customer service - who said, "Good Luck" as their best solution. The problem is - Aluminum cools off too fast. It will NOT retain heat. I wish I could locate a Cast Iron Krumkake! Do they make them anymore? eBay - HELP!!!