I will use the tool to pull in a lot of keywords related to a theme and group them into relevant topics. These topics will either become their own content page or will be combined with other topics to create a page. KeywordTool.io is similar to other tools out there such as Uber Suggest, which I've used for a long time, but it tends to produce more keywords and it provides search volume for the keywords.
Because I’m naturally leery of tools, I was very hesitant to make any snap judgments on Long Tail Pro. But after I read the reviews on the product and learned more about its seriously cool developer Spencer Haws, I decided to give it a go and made the $97 purchase. As soon as I started using the tool, I quickly fell in love with these two main features:
5. Use the Keyword Competitiveness “Fetch Now” feature. Now that your list is trimmed down after you applied all those filters in the previous step, you use the KC “Fetch Now” feature that saves you time in retrieving all that invaluable information. Again, depending on the number of keywords it has to check it make take a while (remember that LTP needs to retrieve information from several sources including Google and Moz). During this bulk check if LTP prompts with Google captchas to fill out, just close the software and wait 10 minutes to reopen it and continue your work. (This issue should have already been fixed now with the latest updates to the tool.)
But it’s still very useful for getting search volume data (provided your account still shows this), which is helpful when choosing which of the many keywords you’ve found to focus on (although you should take these estimates with a pinch of salt, they are still useful in indicating the relative search volumes of different keywords, even if the absolute estimates are a little off).
Update: I’ve now been using Long Tail Pro for 5+ years. There are now many different keyword research tools and lots of people prefer some of the newer tools. Admittedly – Long Tail Pro had some hiccups and went through some rough times as they transitioned ownership and introduced the newer cloud version. But – all of the bugs and kinks have been worked out and Long Tail Pro is now better than ever! I’m happy and proud to be able to continue to use and promote Long Tail Pro as my keyword research tool of choice.

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.