I think it all comes down to how you want to manage your spend. I get decent conversion off of Bing, so why not? Yes, the tools are no where near as comprehensive as AdWords. Yes, the traffic is a fraction of Google. Yes, their policy of acceptable keywords is much tighter than Google. But, no, I can't complain about the relative performance of Bing.
I've always used adwords and have much experience with it so I personally have stayed with it. Their advertising space/market is much bigger than all the others so why not stay with a good thing.
I would say gogole adwords , its better and easy way to earn and also cost per clicks are really high and cannot be compared with other networks , getting accepted though a bit tough..
I have used Google Adwords and I think your conversion rates are very good despite having difficulty swallowing the CPC can get expensive. If only we could find a platform with the conversion rates of Google, but with a little lower CPC would be a great combination. I think Yahoo / Bing gradually catch up with Google AdWords and will be a force to be reckoned the near future.
I gave up on Google Adwords and switched to Bing because of problems getting an ad approved. We sell a program that keeps track of golf scores and calculates your handicap. I had one of their staff build two ads for me that ran for a couple of weeks. I went in to change one of the ads and that ad was disapproved because it violated their policy on gambling sites(??). After some experimentation I found out that they were objecting to the word "handicap" even though the original ads both had the word handicap in them, and they have many other sponsored sites that do golf handicaps. My guess is their evaluation software was triggered by that word. I went back and forth via email with their support staff but were never able to get my ads approved. Apparently there are no golfers at Google. I finally gave up and went to Bing. No problem there.
I need market share with Google Adwords.I think google adwords is much better then bing. Google adword and bing is do work same think both of them but it depends on your strategy