I bought this product some time ago, and I got a discount for $10 because I had used Zone Alarm Firewall on a trial I believe. Like mentioned on other topics, it isn't gonna protect your whole computer but just the browser and temporary files. For me this works great because I want the immediate protection that Returnil supposedly doesn't. I tried downloading Sandboxie and anti-Keylogger to which neither seem to work in conjunction with Forcefield. I guessing that's because FF already had the protection. I could be wrong. Anyhow, I haven't experienced any problems, but things like Safe Step and Sandboxie are probably preferred if you can get them for free and also their comprehensive protection. I on the other hand am ok with FF for now since I rarely used the computer for anything other than surfing. Nothing from the surfing session is recorded, and since I don't use the other areas of the computer to record sensitive information, it isn't an issue for me. However, if installed Password Safe for housing. If it's doing what it's suppose to, the passwords are secure in a box or zone of your computer which is on the tab. After the password is used, it erases the memory. So just to say FF works to the extent as far as browsing protection.