She's the best and the sweetest! I've had some pretty bad experiences with stats department professors before but she was such a blessing! No doubt the class was hard; I spent 4 hours to understand each 75-minute lecture. But she explained things very clearly with organized slides and some handwritten derivations. She responded on Piazza fairly quickly, and she went to great length to make sure that we understood. There was one time when I posted a question on Piazza--she spent half the next lecture going over that.
HWs were not entirely from the textbook and were not easy. However, she would basically go over all the questions in her OH. She posted HW solutions, practice exams, and exam solutions. The structure of the grading, where the final was 50%, was quite stressful, but the exams were pretty fair. None of the questions was meant to trick you, and she tried her best to tell us what we should remember and what kind of questions we needed to know how to solve. An A is very doable and an A+ is possible.
Oh she also gave alternative exam-taking times for students on the other side of the globe. Just a considerate thing that not all professors would do.