If you do have a google acc and use it to check the competition in your niche, you waste your time. Test it on my one example. Typing this phrase in your google keyword tool; BOATING EQUIPMENT Then find this phrase in a list there; BOATING STUFF competition 0,3. Now typing this phrase first; BOATING STUFF competition 2,7. And so, I think this is a large difference between 0,3 and 2,7.
They know, they use their tools for misinformation all the time. That's why I end up using a few other keyword tools like SeNuke,market samuri and keyword elite to get a better picture of what is really going on.
I personally don't think any keyword tool is completely accurate. They all give different numbers no matter what.
I agree with you PPC-Coach, I've tested the accuracy of different tools by querying keywords I've got 8 years of data on from my own Google PPC campaigns and the figures they return are frankly laughable.
GKT is also awful in suggestions, semrush will give much more! Semrush shows in a lot of times more words than gkt.