Like google, yahoo, msn, amazon, facebook, myads, looksmart, advertise, AdBrite, BuySellAds, AdMob etc.
What kind of reviews do you want ? btw Admob is different to others it's for mobile like MobGold, InMobi, etc.
I know. I just wanna know what can drive useful traffic and what are money-killer according to your online advertisement experience?
^ All of them can make or break you. It doesn't depend on the network as much as it does what suits you best, and where you find your pockets of profit. You'll get false positives if anyone discludes some or says only google is good etc..
Yes, according to my experience, All of them are rubbish, but google, yahoo. And google is better than yahoo. I have good convertion rate only in google.