The company's first-quarter earnings helped restore confidence in its full-year guidance. UPS (UPS 0.14%) investors got what they wanted from the company's recent first-quarter earnings report. The market was left unimpressed after management's investor and analyst day in late March when management laid out its three-year strategic aims and financial targets. However, the latest earnings helped restore confidence in those targets. Still, is it enough to make the stock a buy? Here's the lowdown. UPS cheers t ...