Hidden costs of Schwab’s ‘free’ ETF trades Commentary: The price may be right, but the fund selection is far from it

http://www.marketwatch.com/story/hidden-costs-of-schwabs-free-etf-trades-2013-02-11

This article is great example of how NOTHING is free. When products or services are advertised as "free", there is usually a hidden charge or an extra fee that needs to be paid to get the full service/product.