I've heard some excellent reviews about this tool... has anyone here actually used it and if yes what do you think about it. It isn't exactly the cheapest tool around.
Try this Google's tools:
https://adwords.google.com/o/Targeting/Explorer?__u=1000000000&__c=1000000000&stylePrefOverride=2#search.none!ideaType=KEYWORD&requestType=IDEAS (https://adwords.google.com/o/Targeting/Explorer?__u=1000000000&__c=1000000000&stylePrefOverride=2#search.none!ideaType=KEYWORD&requestType=IDEAS)