I'm not a member of SAlt, but the people I've met are very dedicated and very well-read. It's not like they're just regurgitating something they've been told to say.
I think they sometimes can come across a bit stronger than people are used to, mostly out of a genuine desire to win you to a socialist point of view.
I've personally had no reason to dislike them, and all of the criticism I've seen so far hasn't really made sense to me (from a socialist perspective, I obviously know why One Nation voters wouldn't like them, lol)
I'm just not part of them because the requirements (mostly regarding time commitment and membership dues) from members is a bit more than I'm currently willing to do.
I'm happy in VS (Victorian Socialists) and happy to have them around in VS.