It appears to me to be a useful tool. The only question to my mind is the organic results?Seems to be a little out of alignment with the results that I see.
Just wanted to share that I usually use http://www.spacky.com for keyword but since it went down a few months ago, I searched for an alternative and found this one...
SEMRush - service for competitors research, shows Google organic and AdWords keywords for any site or domain
Not sure if this is accurate or not. Is anybody already using this? Would love your input!