The good: Provides lots of recurring credits during runs on HQ.
The bad: Incredibly slow to act. If you Install, Run, Run, Run, you don't see any benefit until the next whole turn.
The ugly: Purge virus counters.
Synergies
Just-in-time installers: Personal Workshop, Savoir-faire, Self-modifying Code, Clone Chip
The central-only breaker suite: Alias, Passport, Breach
It's a neat idea, but even with the synergies above, it still feels like a weak card to me.