I use this a lot. It's not perfect, but better than nothing. For example, last time I checked it did not support reusable workflows, and I have had a few cases I got some error from github but act worked. I guess it's a hard catchup game, not only do you have to get the semantic for correct workflows correctly, you also want to error out on the same errors.

I really don't understand why github don't release a local runner for github actions. Everyone I know which has worked with cicd wants the same, some way to run and debug the pipelines/workflows locally.