Proven system-wide response and more effective than competition.
"...clinical data indicate a systemic response against the targeted cancer type rather than just a local response at the administration site. However, I believe the likely lysing (cell disintegration/degradation) induced by the electroporation technique provides for much more efficient exposure of the specific cancer cell type's antigens to dendritic and antigen-presenting cells (APCs) than the simple intratumorally-injected IL-12 of old or even perhaps more efficient than Ad-RTS IL-12."
Source: Latest article on Seeking Alpha. A brilliant piece to say the least, albeit a bit technical .