i have used it nearly 3 times to get the keywords for various projects, but after getting ranked for those keywords, the traffic isnt what it was predicted. They take up data from search stats on Dogpile.com and metacrawler Also, they take data from overture. In actual situation, the searches from google should have been more, which isnt happening. I would have even liked it if it was having 30 -40 % of the predicted traffic. So, i want to ask others, if they think wordtracker is worth the time and trust we might put in it.