Keyword Researcher is designed to search the Autocomplete databases of Google, YouTube, and even Amazon.com. That's a lot of keyword sources! As you probably know, if you're building an authority site, or if you would like to become a dominant player in your niche, then starting with a large database of keywords (that your customers are actually typing in) is a powerful marketing tool.
What are you waiting for? Today is the first day of the rest of your internet marketing life. Yesterday would have been a better day to get Long Tail Pro. Tomorrow might be okay too. But today is even better. I’m telling you – when I first got my copy of Long Tail Pro – I was like a kid at Christmas time. It was SO much fun opening up new possibilities that I didn’t have without Long Tail Pro.
It would be great if you can provide comparative analysis of this tool with Google Keyword Planner. Since you’re using this tool so you can provide best comparison. One differentiation which I understood is that this tool works for yahoo and bing as well whereas Google keyword planner works only for Google but Google being a dominating search engine, gives the highest returns, so only this reason may not be enough to buy it.