It’s very easy to use, fast and smooth and gives you tons of Long Tail Keywords. You only pay for the web based software once, so there are never any monthly fees. I’ve also been impressed over the years at how easy it is to update. These updates are free and the creator (Clever Gizmos) is always moving with the ever changing world of SEO and updated API’s to keep his program up to speed and fresh.
In a nutshell, Long Tail Pro helps you quickly find keywords in bulk based on a seed keyword that you input. In addition to returning hundreds of related keywords, the tool also shows search volume (monthly search volume), advertiser bid, number of words, rank value, and my favorite Keyword Competitiveness (helps you judge the competition and keyword difficulty).