Johnson's lectures are well organized and straight to the point. Her final is really nice, because it isn't straight memorization. I made sure I understood all the main concepts and experiments that she taught, without memorizing every little detail and did really well. Her office hours are also really helpful and she's pretty funny. I'd highly recommend this class. I don't think the curve is that bad. I did exactly average on the midterm and I still ended up with an A in this class.