This is one of those things that it really works. If you're looking to improve your "Organic Traffic" then this is the right tool for you. It will provide a wide range of long tail keywords but also related keywords and questions where your main keyword it's being in use. I'm using this wonderful tool for my "Spanish" websites and I'm getting good amount of "Organic Traffic" from Google, I'm getting right now 300 to 400+ Organic Traffic per day. Just take in mind that this wont happen in 24hrs it takes time to Google crawl your long tail keywords. So I can say that it works very good in English and Spanish "Keywords".