Professor Mitchell is a really good professor. I took this class for a GE and if you're looking for an easy GE, then this is the class for you. The workload is manageable and not difficult at all. I'm selling my book for this class: Understanding Weather and Climate by Edward Aguado and James E. Burt if anyone needs it. Send me an email at firstname.lastname@example.org if interested.
Professor Mitchell has really good material prepared for each lecture (especially his cartoons) so it really helped understand confusing concepts about the atmosphere and weather. However, I do have to say that he speaks kinda slowly and boringly.. I dozed off in class for a number of times so yea. Read all his lectures slides and go to the TA (I had Dilhara, who is amazing and nice and knowledgeable) and you should have no problem. Exams are only multiple choice with a few short answers so no big deal. Weekly discussion/lecture/at-home quizzes though so that could be quite a bit of work. Otherwise the quizzes really did help consolidate understanding. I wouldn't say it's a great great class, but I did learn something from it and now whenever I look at the sky, I know why certain clouds are formed! Pretty interesting to understand all the natural phenomenon I'd say. And he's a geek at cloud formation!