My DD18 took it and here are my thoughts:
1/2. It was a decent amount of work. For her, more than AB Calc BC.
3. A lot of reading and debate and discussing.
4. Originally, I thought no. But she has to write a thesis in college, so it is extremely helpful for her background knowledge.
5. There are other AP classes that are more valuable. (imho)
6. Will you be entering a research-based field? Doing lots of presentations? Then, yes. Otherwise, probably not.
7. Depends on the teacher! She had a mid-A and a 5 on the AP exam.
8. Not as many as other AP classes. Her University just added it, but it is a gen ed type of credit. They don’t really know where to put it.