Google, Overture and MSN.

You go with anything else and you're risking getting tons of fraudulent traffic and even the big 3 are not immune to it.

There are just too many black hat SEO types producing too much fraud to trust anything other than the big 3.

Well, obviously that would be adwords heh
But when you need lower prices, use smaller search engines

I consider smaller search engines to be fool's gold. The numbers look good, but they're empty. Always go for quality over quantity. Unless you're being paid on a CPM, hehe.

I keep hearing that people have better results with the smaller search engines. You can bid less, and for some reason they convert better, resulting in a drastically improved ROI. However, for me, I cannot validate the time and effort required to set up a PPC campaign to reach their miniscule 1% market share.

Google adword is the best. Msn is good. Yahoo No good! thats for me!

Yahoo has just too much of a slow and bulky interface for me.

Of course I use Adwords!!!

Depends on what domains you have, where the traffic comes from and what keyword you are using

google ADwords is the best.....

for me the best one is ads-click.publisher 1 of the reasons is that you can search by best performing keyword and make sure you have the type of ads you really want to show on your site.