Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Serious reliability issues

This product is great until it breaks down which will be around 6 months after you purchase it. I have purchased one, had it replaced by warranty only to have the second one break down after the waranty expired. It has serious reliability issues. When you call customer service to ask what the service code that displays on the machine means, the answer is always that you need to replace the whole unit and they'll be happy to sell you a new one for $400.