Instruct: Classify a given Amazon review as either positive or negative.
Query: Best mortgage calculator out there!

This is the best mortgage calculator out there hands down! Forget the old school HP's. You don't need a degree to figure out how to use this. No long formulas and zillions of keystrokes. You only need 3 factors and you can hit the button to get the 4th one quickly. Would highly recommend this product over the other mortgage calculators out there.