I'm very vocal on here about my membership and participation in so take a look through my comment history to see lots of discussions on the subject.
For me, PSL has been a fundamentally different sort of organizing experience than anything I've been involved in before. The first decade of my political activism on the left was mostly in anarchist-adjacent circles that spent their time primarily on interpersonal drama and essentially no outward facing work.
PSL on the other hand is always about doing effective political work towards a strategic end. At all levels of the party - from a unit of five people to national leadership - we implement a Marxist process of investigation, outreach, action, reflection, and planning. Cadre are trained through a year long candidacy program to develop all of those above skills and a general literacy in Marxism-Leninism. The political line and analysis are consistently excellent. Our history of principled stances on anti-imperialism is the reason we've been able to do so much to empower the Palestine movement. When Al-Aqsa flood happened, we were rallying in the streets across the country immediately. We had two decades of Palestine activism to show our seriousness, and resolutely supported the Palestinian resistance when liberals and DSA (I repeat myself) were crying about Hamas.
Right now, the party is doing a campaign to defend Venezuelan democracy and socialism. It's a much less popular position, but we know through history that parties who tail the masses can never lead them. Instead, the party proactively sent journalists and organizers down to Venezuela to observe and report on the election, to show the way working class Venezuelans support the Bolivarian project in a way that doesn't depend on imperialist media.
I have never felt more like my political work was actually achieving something that I do in PSL.
I can answer any questions and talk in plenty more detail.