A great tracking tool for PPC advertisers, consultants or affiliate marketers. The tools help me watch and monitor on competitors' keywords , ad copies and landing pages across three major search engines. I've used SpyFu in the past and was unhappy with the accurateness of the data. I've tried other keyword tracking tools too such as Adgooroo - it was way overpriced. So far I think this one has the most user-friendly lay out, fresh data, & gives the best value for your money. I'm a bargain shopper, always looking for good quality stuff with less $.