Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A great program if you need all of its features

I've been using Quickbooks in its various forms since version 1.0 (for DOS!). So by now I consider it indispensable. But Quickbooks 2003 Premier Contractor's Edition is quite pricey, even with the rebates. I would only recommend it for larger companies with at least a few employees. Many smaller contracting companies (such as mine) would manage very well with just Quickbooks Pro 2003. Also, if you haven't used previous versions of Quickbooks before, (when it had less features) it might be best to start out with the simpler versions. Its help systems are very extensive but if you need any assistance from Intuit be warned that they charge for it either per request or by a yearly subscription, which I feel is a bit of a slap in the face considering the cost! The extra features such as the Change Orders and Contractor specific Job analysis and reports could be helpful but for me at least that remains to be seen.