Is spyfu believable???

I find somwhere in this forum and find spyfu.com.Can I trust it???
It seem give diff results with https://adwords.google.com/select/KeywordToolExternal but more infomation.
And how can they take so many infos???

 

Where do they pull their information from... that's your answer.

 

Where do they get their information from?

I studied their stats once about various companies and sector leaders spends and found it believable and interesting. It encouraged me to start a few adword campaigns

 

but when you said it believable so google keyword tool give diff results become unbeliveable (about the volumn search)
still dont know how they get these infos