I’m impressed with SPF’s memory usage – 7MB only while it’s actively monitoring the network for any intrusions and continue to monitor applications that require network connections. While browsing, SPF is doing its job by blocking what I asked it block – scripts, ads, cookies and referrers. Its speed in alerting me on any applications or modules that will use a connection is impressive too. There’s no slow issue in using SPF together with popular applications (browser, email, instant messenger and system utilities).
It reports itself without a glitch to Windows Security Center of Vista and it did not conflict with existing resident anti-virus protection, Microsoft Security Essentials.