I am soooooo tired of paying for security software.
Actually, the additional control provided by the Enhanced User Interface in the Pro (paid) version is well worth the price of admission. Scheduled/automated scans and push updates are icing on the cake.
Be aware the Script Blocking provider does not work in Firefox (or Opera or Safari as far as I can tell). That's no big deal and it's nice to know it's active when IE runs Windows/Office/etc. Update.
IMHO, if you ran PC Tools' ThreatFire you wouldn't need to run Superantispyware at all.
I wasn't wild about ThreatFire initially, but the current v3.5 seems to have matured well.
Cheers!