PNC Financial (PNC 0.44%) is one of the nation's most popular regional banks. Based in Pittsburgh, it operates more than 2,900 branches across 19 states and the District of Columbia. It has $305 billion of assets on its balance sheet and approximately $336 billion in assets under management or administration. But while these are impressive figures, do they make PNC a good stock to buy? Motley Fool contributor John Maxfield discusses this question in the video below.