An article in the ESQ section of the January 2009 issue of California Lawyer magazine offers a nice summary of free legal research case law databases.  The article, “Search Freedom – New online services offer law searches gratis,”  by Jake Widman, also reports on a survey involving Precydent and its retrieval abilities:

. . . To test Precydent’s search functions, CEO Thomas A. Smith, a professor at the University of San Diego School of Law, asked several law professors to list the cases that should come up in particular example searches. He then compared the results obtained on Precydent against those from commercial services. Precydent, according to Smith, delivers results that more closely mirror the law professors’ lists.