well i m not using adwords since i dont believe its the best way to market ...something like video as on youtube or sumthing which turns user itself to come to your site again and again will be more handful!
Of course I am using it. It is my favorite and most profitable PPC program i have ever used. Although there were many controversies and fraud clicks on adwords, i find that google's way of finding it and rectifying it has made it a successful program yet!
I know someone who did very well in adsense earning by using Adwords to get quality traffic. This means, If you know how to do it the most effective way, then Adwords is a powerful method.