This is one of the most complex, sophisticated and mature tools that can really simplify the process of meaningful (from a human perspective) and effective (from an SEO standpoint) content creation for anyone.
In my opinion, if you are a solopreneur and want to save huge amounts of time, this is an investment well worth the money. However, you need at least 3 codes, otherwise you won't unlock the full potential of this tool. I stacked 8 codes for the sake of credits, which are indeed very expensive otherwise.

Even with the new price tag of 25 USD per credit, which means you get a first draft for 50 USD, it still makes sense to stack as many codes, since additional codes will bring you to a price tag of less than 14 USD to produce a first draft (1 credit for the content brief + 1 credit for the first draft).

My plan is to use this tool in conjuncture with Blogely (another tool I've stacked and I am glad I did so).
I truly believe they are worth every penny I've paid (and this was not an easy decision to make). For those planning to stack at least 3 codes, get yourselves a Briefcase subscription right now (briefcasehq.com) and make the purchase after you sync it with your appsumo account. It's the best route to go.