It was an internal (not yet open source) tool when I used it, so the docs and people behind it were much more available to me than it would be now as a public project.
Ah, gotcha. I tried installing it and the first thing it gave me was an error message. I googled it, couldn't find the answer. Got an answer now, it worked for a small toy example at least. But I haven't gotten around to try it out further.
I feel like the dev experience - without internal help for initial setup - isn't quite there yet, especially regarding error messages and documentation.