I'm using the tool extensively and to my opinion this is the best and most accurate tool out there in terms of the actual difficulty scores.
A few suggestions after using it for a period of time:
- Please offer a paid version!

I would like to have a version that isn't limited to the 100 calls per day.
- Export the detailed keyword view
Would love an image export or preferably csv of the difficulty score overview. Working with screenshots sucks
- Missing data
Sometimes there is no info (displayed as -1) for some/all of the top 10 sites and the difficulty score is to low.
You can't re-research the keyword cause it pulls the results from cache/memory.
1. please fix this
2. for now, would be great if we can see in the keyword overview that the difficulty score is not accurate due to missing information.
and lastly a nice to have;
Would be great if you could get some insight in the 'type' of sites ranking top 10 and calculate that into difficulty (youtube, wikipedia, .gov, news sites, etc.)