The primary objective of this study is to compare the efficacy and patient preference for spinal cord stimulation (SCS) using the Precision device with the electrode array placed at T7 versus placement at T8. Eligible patients will have chronic intractable pain in the back or lower extremities and will have independently elected SCS as the next line of therapy. There is some anecdotal evidence that the coverage of the paresthesia resulting from T7 placement is preferable to that obtained by the more commonly used T8 placement but there has been no study to support this observation.