Does anyone have an opinion of KRA PRO?

It will help you extract keywords from your Wordtracker campaigns (separate subscription fee) which match the criteria you limit it too. For example, say you are targeting people with acne problems. It will find those question type keyword phrases to help you build articles around. It will tell you approximately how many searches for these phrases are asked per day and how much competition. It will also find those theme words associated with your primarily keyword to capture additional search engine traffic and which makes your article relevant in the eyes of the SEs. Andy Williams probably is the least hyped-up Internet / Affiliate marketers out there and what he teaches is purely whitehat follow the rules SEO methods I don't think anyone can challenge as ineffective. His Fat Affiliate course is free and worth taking a look at.

And by the way, I do own a copy of KRA. If you don't have time to do your own keyword research, Andy provides his Niche Blueprints which covers what he thinks are profitable niches based on KRA. Each Niche Blueprint comes with a limited version of KRA preloaded with a keyword database extracted from WordTracker. If your time is limited, then these Blueprints will drastically save you time and allow you to concentrated on creating content, aka articles, etc.