I had a review of this tool also. Its very useful. As you can see from the screenshot there are a couple of modules in the tool -
Amazon product search - this allows you to search amazon for products based on keyword, category, price and also some other filters like best sellers, new arrivals etc.
power suggestions - This is sort of like Google suggest I think, you can put in keywords, or transfer keywords from the amazon product search tool, then it will find variations of that keyword or phrase - it finds a few closely related terms and you can also have it automatically append words to the phrase which helps the tool to find a lot more variations.
search volume - here you can find search volume, CPC, competition score and so on for your list of keywords.
Competition checker - Here you can get in depth information on the competition for any particular keyword - it lists the top ten results and shows DA, PA, backlinks and other useful information to help you determine the real competition for any given keyword.
Each section allows you to export data to CSV file and also its easy to move data from one section to the next.
Basically this is a one stop shop for doing all of your research and would be really helpful if you want to get into Amazon affiliate marketing but you don't want to pay someone else for keyword research.
Definitely a very nice tool, priced fairly and also the fact that
@Jayder has offered a 7 day trial means you can easily sign up and check out the features for yourself.