Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great customer service

Jason at datasales.com demonstrated the best customer service available. We ordered this laptop, and had it for about a week before we realized there is no sound. So I called him, and without blinking an eye, he offered to send another laptop -- that he wanted to make sure there wasn't a problem, and that the best solution would be to send us another machine. He did this within two days, and now is paying for the shipment of the first machine back to him. A good guy. Totally recommend. the laptop is nice. chunky keys. love it. Not a lot of memory (which doesn't matter because we store things on an external drive), but fast enough for us. And for less than $150!