They're currently the fastest growing Third party proportionally. They're the 4th biggest(6th overall) and set to overtake the Christian Nationalist Constitution Party for 3rd Biggest Third Party sometime in the next year(only behind the Libertarians and Greens)
As I understand it, a lot of the leftists I associate with don't like them very much? Mostly of the anarchist variety. I don't actually know what the story is there though, it seems more personal than just ideological differences. This is really unfortunate because they're the only leftist group that's actually doing significant work where I live. None of the other groups have any presence here, so it's PSL or bust.
They don't seem to have much presence here as far as I've been able to tell. It's a very purple state so you'd think all the orgs would be here, but they're really not.
They're actually the only third party on the ballot period. PA is notably hard to get on, the Libertarians fell apart and the Greens got blocked.