It has great user docs, API docs, developer centric UI elements like copy pastable IDs, webhook event browser, time travel features, test mode (!!), and you can even look at the exact API calls that the stripe UI itself is making. I've brought it up to many colleagues are awesome the docs and experience is...
IMHO, for most things, the data model is straight forward and well explained. Of course there are complicated topics and quirks, but that's just because payments is not easy in general..
I'm clearly a Stripe fanboy, but I am not affiliated in any way.