Poor

Professor O'Reilly is very unapproachable during her office hours and her tests are incredibly difficult, but she is a great lecturer. Your grade won't reflect your knowledge, even though you will learn and understand the chemistry concepts. If you want a serious challenge than I would recommend her, but college chemistry is difficult as is.

Average

I had Professor O'Reilly for laboratory and enjoyed talking to her. The laboratory lectures were written by her. So, she expects them to be perfect. She reads everything in your notebook. Sig figs and units are extremely important, because she will take points off. I would not take her for laboratory, but she would be fun to have lunch with.