Mason is one of my favorite professors in the math department. He rarely teaches undergrad courses, but he designed this course for the data theory major. There's a big focus on creating your own math models. This is much different than other lower div math--grading is on your process/assumptions and not necessarily getting the "right" answer. Mason has corny jokes and shirts and showed us his extensive collection of plushies which was awesome. Live lectures and discussions were clear and recorded, although his handwriting is hard to read (which he openly admits several times lol). He posts his notes from class as well. Both Mason and our TA (Gyu Eun is the best!!!) were very flexible about due dates--we had a 1 week grace period to turn in assignments and more if you just talked to them about your situation. They were especially accommodating at the end of the quarter with all the protests which was really nice. We had 2-3 weeks for a group project on one of the MCM problems with a 20 page write up but it wasn't too bad if you split up the work. Some of the HW problems (esp. the project ones) can be tricky and take a few hours but OH and disc are really helpful. Def recommend taking with Mason if you can!!