I strongly reconmend it over others, it seems to be one that others imitate or steal the Spybot database from. If you can afford it, give him a donation because he isn't charging for his software.

[link|http://security.kolla.de/|http://security.kolla.de/]

Spyware is a serious issue, from a tracking cookie to the system DLL running in the background capturing keystrokes, to other nasty things you don't want your Windows OS to do.