I use the same one. It wasn't much good until a few months back when they came out with a new version. Now it works very very well. Buy a one yr subscription from somewhere online for $30 in the form of a CD mailed to you, then you can put it on more than one machine in your home with one year of updates. I wouldn't do this, but I have heard of such a thing.
I also use free: AdAware and Spybot as supplemental. AdAware gets more than Spybot, but Spysweeper seems to carry out 95% of the garbage.
:-)