I think, it is important to find the right keyword to rank for, however what is missing is how did it really ranked first page of Google.
I am interested on this tool, I have also other tools that show me low competing keywords, but the ranking part is missing which is not really nothing to do with this tool anyway. I think, we should really look at this tool as a way that it finds you low competing keyword and keep ranking separate.
It was interesting for me to see that the WP press site that was ranked was not even optimized for On-page optimization and permlinks were not used, etc.
Interesting tool, looking forward to give it a try.
Thanks
Mike