Tesla Motors' (NASDAQ:TSLA) Model S is raking in the awards and accolades across the board. The company's performance is incredible, the safety ratings are best in class, and it's beloved by consumers. But is the stock as great a buy today as the car? In this video, Motley Fool analyst Austin Smith looks at the biggest problem facing Tesla stock today: The market already knows what a great car this is, and it has made the stock a very pricey meatball indeed. Austin examines what kind of upside might be left for Tesla investors who buy today.