Total opposite for me. The teacher who does APUSH at my school is awesome. Really good teacher, but his tests are so hard and this last unit test (which I got a fucking D on) encompassed FOUR chapters. All of which are around 35 pages long. -_- That's my only complaint with the class: too much information in too little time.
AP Lang is better but it's still difficult. You're given an extremely harsh time constraint on writing your essays for difficult passages (which you only have like ten minutes to read and analyze). I really like the teacher too. She's extremely nice and she laid out the class goals in an interesting way (first semester is seeing how people use rhetorical language to manipulate you, whereas the second semester is about how you can use rhetorical language to manipulate other people).