With a brand-new chairman and president -- and a stock-split and improved dividend yield to boot -- everything seems to be going great for Westinghouse Air Brake Technologies  (NYSE:WAB) this week. Shareholders are up 60% over the past year, and the company's got one of the fastest projected growth rates in the whole railroad equipment supply industry.

But does this make "Wabtec" a good investment idea? Fool.com contributor Rich Smith isn't 100% convinced about that. Listen in, as he discusses the pluses and minuses of this best-of-breed investment.

Motley Fool contributor Rich Smith has no position in any stocks mentioned. The Motley Fool recommends Westinghouse Air Brake Technologies. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.