Not particularly. She has basically no real experience in political office, despite running for several offices. Some of her policy positions sound fine, but without any way to actually implement those policies, they're just empty words. Plus there's some shady implications between her and Russia, and historically the Green party is funded by Republicans because they're an effective spoiler.

So she sounds cool on the surface, but without more progressives in Congress her attractive policies aren't remotely actionable. If you want a useful progressive candidate, vote for progressive in local and state elections every chance you have. This presidential election is not an effective time to vote third party.