With all of the good free keyword research tools out there, why would anyone ever need to pay for one? Well, when I saw pages and pages of Internet Marketing Forum comments listing Market Samurai as one of their top two most valuable IM investments, it made me sit up and take notice. I got the free trial, did the training, and... became a Market Samurai convert. Now that I have become expert in using the software, I wanted to offer a full review of the product for others considering in investing in premium keyword research software. Read on to find out how Market Samurai satisfied my top-5 requirements.