Great guy, a bit quiet but if you actually pay attention and want to learn, just keep asking him questions and he'll be more than happy to help. It's very hard to not do required readings etc and expect him to talk you through what's going to be on the exam.
I've taken a lot of courses in my life but Dr.Carlos has undoubtedly been the best both in my life and at UQ. He is so approachable that whenever I email any questions, he swiftly replied with detail explanation with willingness. When it comes to assessment I found out that he is very flexible and open-minded so this really reduces my tension for the exam (while other lecturers tend to set a uniform solution and give 0 mark for any answers different that although it's correct).
After finishing the course, he was the only one who was happy to be my referee and he paid a lot of attention when doing this although I know he's very busy with his upcoming teaching. He is very delicate and dedicates teacher. As an overseas student from other countries, I really feel grateful for all good things that he's done for an ordinary student like me to have an inspiration to continue my study here.
I've come accross bad lecturers, but it won't get any worse than him.
He has made this course unnecessarily hard by making poor exam papers, also HE DOESN'T GIVE US A FORMULA SHEET!
Very poor teaching skills and I wonder how this person got into UQ.
He is a very lazy person. Doesn't make his own tutes/lectures. Doesn't put any effort into teaching. Always gives textbook references in tutes instead of putting the entire question (not all students have text books!).
And finally he doesn't know how to make a paper as he puts higher weights into questions that don't require a lot of working.
My one piece of advice to you, if Dr. Oyarzun is teaching your class next semester, don't do it, wait till next semester and hopefully you'll have someone else. Not only will you not learn anything from the lectures and have to teach yourself the course (with the help of excellent tutors), but you'll also feel like you don't have the required knowledge to progress through your degree. I'm sure Dr. Oyarzun knows exactly what he's talking about, and I don't question his mathematical ability, but there is not a trace of teaching ability.
As an example of his ability, we had a question in our mid semester exam that was taught the week after the exam. Just what you want.