Google Insight Revisited

I wrote a bit about Google Insight a few months ago and I continue to find a very useful tool. The only way of getting to see what Google sees in term of search is the Adwords Keyword Tool. I do find the Adwords tool more useful as you get some idea of search size and suggestions of similar keywords. Insight is more precise insofar as you would have decided on the keyword phrases and then research them in more detail. On thing I am not convinced on is the 'Categories' as I am not sure how these have been arrived at. How does a search fall into one category and not another? When searching on 'search marketing in chichester' does that fall into Business, Internet or Local just to name three. I will let you know when I figure it out!