This paper describes the results of field testing of the XG Radio system. In August 2006, the XG Radio system was field tested at Fort A.P. Hill, Virginia, in the laboratory, and at field locations in Northern Virginia. The XG Radio system uses dynamic spectrum sharing technology to determine locally unused spectrum, and then operates on these channels without causing interference to the existing "non-cooperative" users. There were three major test criteria: To "cause no harm" (to avoid interference), to "work" (to form and maintain connected networks), and to "add value" (efficiently use spectrum). In this paper we define test metrics for fulfillment of these criteria, and describe the test results. A companion paper describes the field test design and the XG Radio system.