Instruct: Classify Amazon reviews into positive or negative sentiment
Query: HP12C Financial Calculator

I was annoyed to discover that in tvm calculations the machine rounds up the number of periods and there is no way to prevent it. This is also stated in the manual. Lest someone is tempted to call this a feature, consider that the "feature" has been removed from more recent financial calculators (thus solving for 'n' on the 17BII correctly displays the fractional part whenever appropriate). Also, the construction is somewhat sloppy; on my sample the keys rattles when the calculator is shaken and the Enter key is labeled slightly off-center.Doubtless, the HP 12C makes a powerful fashion statement on everyone's desk, next to that typewriter and rotary phone. Those who value substance over style, however, should look elsewhere.