Overall, this is a good class. Liao offers lots of extra credit, group work, and his lectures are clear and helpful, although they are not recorded. That being said, I think he realized in the last week his class was on the easier side because he blindsided us with a final so difficult the average was a 63, and he did not curve it. My final dropped my grade 10% overall. If this were not the case, he would have stellar reviews from me.