Thumb's up!
Glad to see someone knows the best there is. I'd give up food before I gave up my 'Counter-Spy'.
While Counterspy is quite good and one of my favorites, ALL of them miss stuff. I have scanned really clotted-up PCs with CS, cleaned it, then immediately found stuff with a Spybot S&D scan. Removed it there and ran Adaware- it found yet more.
It depends how bad the infestation is. If it's really bad- a blended counterattack with several utilities is the best bet. And, like with pulling weeds, there still may be something left.