Three things you did not know
The promise, and how to call it in.
Every Wordprint a person builds comes with the same undertaking: if it does not tell you at least three things you did not know about your own writing, you do not pay.
The automated products are not sold on that promise, because the promise rests on somebody's judgement and they are priced without it. The £95 Soundalike and the £395 self-serve Wordprint carry a narrower one instead, and it is about defects rather than taste: if the tool cannot read what you send it, or the document arrives incomplete or wrong about your business, you get your money back. That covers the thing going wrong. It does not cover a document that did its job and told you something you would rather it had not.
No argument, no negotiation about what counts, and nothing to prove. Say so and the money goes back. It is easier to honour the promise than to litigate it, and a promise that gets litigated was never worth making.
The document stays yours either way. Taking it back would be petty and would not achieve anything.
If you would rather just write, [email protected] reaches the same place.
Why the promise is shaped this way
It sets the bar internally, not just for you
Three specific things is a harder test than "were you satisfied", and it is meant to be. A document that describes your writing accurately and tells you nothing you had not already noticed is a well-made thing of no use to anybody.
It does work at this end too. Every Wordprint has to clear that bar before it is sent, which is a more useful instruction than asking somebody to do their best.