I understand this is still under development and I can't full judge the content unless I paid to unlock it. But this looks like a pay version of what is available on the freeCodeCamp[1]. freeCodeCamp is not only free, you can see the entire user story[2] before you take on the challenge, but for Workouts, you have to pay first to see the steps/user stories...
[1] https://www.freecodecamp.org
[2] https://www.freecodecamp.org/learn/front-end-libraries/front...