I'm kind of surprised that noone's mentioned this in use with Sunny! (The first comment mentions no runners starting with 2 , too. . . look no further!)
I've been running 3 of these and 3 Underworld Contact in a Sunny deck and it's honestly ridiculous. Best case scenario, you get these set up early game, and you're making 3-6 credits every turn, clickless, thanks to Sunny's breakers never taking up MU space. With Security Nexus, you've got 3 MU outside your breakers to work with for stuff like Datasucker.
Just watch out for The All-Seeing I.