I recently started playing, with the NISEI Core Set Experience format. I thought I liked Anarchs. After playing with this card once. Criminals became my favorite faction.
In the short term, there's the surprise factor the turn you install this. In the long term, this card takes the tax that the Corp would place on getting into HQ, and lowers it by roughly 50% (!), as they now have to spread thin to defend both servers.
Once you get into the larger cardpool, you can do the same thing by playing Omar. Better yet, Rebirth into Omar out of Val for the surprise factor at 0 cost 0 MU and 1 influence.
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Shishu