I used to use it, but I'm banned from it... Because I had "Invalid clicks". I didn't click on the adds myself, so that cannot be the problem. I had a lot of traffic those days by some search engine crawlers, so maybe that was the problem. But google never wanted to give comment on it or something. I had 45 dollars in 2 months when I was banned. So I gave google a lot of money, and never got something back...
I'm now a happy user of
http://www.adremedy.com/. They also pay for impressions, so with a lot of visitors you can get a nice amount of money, and the don't even have to click on the adds...
But Google Adsense paid me more! So if anybody know another nice company...