The following commentary comes from an independent investor or market observer as part of TheStreet's guest contributor program, which is separate from the company's news coverage.By Tom Taulli, InvestorPlace Writer NEW YORK ( InvestorPlace) -- Coca-Cola's ( KO) cash machine continues apace. In its latest quarter reported earlier Tuesday, the company posted net income of $2.8 billion, or $1.20 per share. This was up from last year's $2.37 billion, or $1.02 per share. For the past couple of years, Coca-Cola's stock price also has been a winner. In 2009, the return was 29.3%, and a year later, it was 18.5%. However, as for 2011, things have slowed down, with the shares gaining only 3.7%. Perhaps the valuation is a bit too high? Or can Coca-Cola bring another double-digit year for shareholders? Here's a look at the pros and cons: Also See: 9 Great Investment Ideas for a Crazy Market.