Green party platform is quite good this year yes. She's been kindof a crank in the past going along with some anti-vaxxers on some shit but I have been informed she changed on that recently.

Jill Stein is cool. A lot of liberals are mad at her because she is snooping votes from the Democratic party by offering people things they actually want to vote for. Especially a weapons ban on Israel.

She's alright but ultimately is a bit watered down compared to Claudia De La Cruz

Personally I prefer West, but Ive voted for Stein before. She's one of the best candidates

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.