Note that many websites have their own advertising, unrelated to adware.
Downloads and displays advertisements. This has been known to install without user consent by way of active X installation.
The installer they provide does not uninstall surfsidekick completely. After uninstallation, you will be asked to reboot. The next time you open up a browser a file called sskrepairinstall.exe will run and reinstall the application. The .exe is then deleted by SurfSideKick.