I just took AP Psych this year.
If your teacher's anything like mine, expect TONS of work. But, my teacher was the biggest jerk in the school, so it probably won't be too bad.
You should really only take this if you have a real interest in psychology, though.
If it's just a filler elective, I'd switch out, because it takes up a lot of time and effort.
The AP test's okay, as long as you get the prep books and study in advance.
Good luck!