I am happy to have found this tool. When I first saw it, I had doubts about whether Tier 3 would be useful for Kdp writers. 
So, I asked a few questions, and the person in charge answered me quickly with clear and specific directions. While this was going on, I had already purchased Tier 1 and was testing the tool to generate funds for my books. The first results of funds for the standing books were excellent. I also tested from above, with the books open, and got good results. The person responsible for the tool replied to my first message, and I decided to buy Tier 3 after reading his reply. I did and all I can tell you is that I was blown away.
 
That night, I went to sleep at 5 o'clock at night because I was thrilled with the data the tool gave me. I put in the ASIN from one of my books to check if the data the tool gave me was correct. I was pleasantly surprised. The tool told me who my buyers were, the strengths of my product, the drawbacks. It analyzed the reviews, and thanks to this, I got clear data about my own books. Can anyone imagine what this means for pre-research before doing a book? Before, it would take me forever to study my competitors' books, their pain points, their strengths and weaknesses. Now, this process will be quick. But, in addition to this, the tool threw up a lot of keywords that I can use and that will be useful. As I said, I did the test with a book of my own that I know perfectly well. So I know that the results I got were valuable. Thanks to this tool, I will be able to optimize my books and do a better market research of the competition. This tool excites me and, if you are a writer on Kdp, you should not miss this opportunity. I already say that this tool is in my top 5 of all the tools I have purchased from Appsumo. On suggestions, I would like the data generated on the ASIN data to be exportable in PDF. And, for Kdp authors, a section on suggestions for the 7 keywords.