Hey, I just gave it a try and it looks like a really good project. I tried the free version and generated one post, I used the URL option for my app https://www.sneakersbook.com/ and detected clearly the whole idea of the project (I guess this is better if the site is optimized).
As a free user with 10 generation for testing I feel like my first one got a bit wasted in terms that there is no options for settings tone, style or at least I didn't see this. Having in mind that the product is based on generation quantity, a little option for customization will be nice.
I used only the main workflow for first time generation so this is my humble take.
Good luck