Stanford Pre-Collegiate University-Level Online Math & Physics

Here’s the link to the site: https://ulo.stanford.edu/physics

I’ve been hearing a lot about Stanford OHS, but I don’t think Stanford Pre-Collegiate University-Level Online Math & Physics is exactly the same thing.

I’ll be a senior next year and since I have already completed the most advanced maths and physics courses offered at my school, I’m considering taking courses from Stanford online maths & physics. However, I’d like to know a bit more about these courses, especially their quality and rigor.

If there’s anyone here who has taken courses from Stanford pre-collegiate maths & physics, could you please let me know what the experience was like? It would really help me decide if Stanford online is the way to go for me (esp. since the tuition is quite expensive, I’d like to make the right choice!).