Consumer reports recently tallied up all the commercially available AntiSpyware programs and listed the beta of Microsoft AntiSpyware as their numero uno choice. See list here.
I can’t say that I’m entirely surprised. Microsoft basically bought the AntiSpyware program then tweaked it a little. And who better to remove Spyware that uses Microsoft loopholes to root itself in than the people that left the loophole in the first place. Additionally, Microsoft has enough money in the bank to pretty much bankroll any program that they want and make it fairly successful as well.