Thank you for a great post! But the question is really rhetorical if we talk about solutions for Amazon sellers. The software or solution usually fit only to the current moment in time. I'm a newborn Amazon seller (It's my first year) and I spent tons of time to research software for FBA sellers because I don't like to pay twice. In many cases when you use two software solution - some features could be in both. Most important is to find a comprehensive directory where you can find most actual products (not a bunch of dead links). From my experience, if you want to read some quality review - welcome to Jordi Ordóñez website. It's a deep analytic product review. But if you need to find the right product in the ocean of e-commerce websites you'll need FBA Catalog - on the website listed hundreds of software tools for Amazon sellers. If any Amazon sellers here - please advise the better directories on your opinion.