Well I don't know if it's better but it did find two things that Ad-aware didn't (both with the latest updates).
1, Alex Toolbar: Alexa is a search toolbar that dynamically inserts web site links of partnered web sites into the web page you are currently viewing, based on your web surfing habits.
2, Hotbar: Explorer toolbar, as well as its own toolbar. Then the program monitors all URLs you visit to add link buttons, targeted by advertisers, to the HotBar toolbar.
So you tell me. I did like Ad-aware.