Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Gets the job done

It was slightly tricky to set up, but a call to the customer service center was all it took to get it working. They were pretty helpful and the wait to talk to someone wasn't that long. We have two Macbook computers and it works fine. I only really use it for email and basic web browsing so I can't attest to how well it works for downloads and stuff. So far, so good.