Ended up in a "Calculus 2 Flipped" class. Do I switch?

I attended my first class and was surprised to learn I'd accidentally joined a flipped class. But after listening to the professor go through the syllabus, it seemed almost too good to be true - especially the lack of exams, with the grading instead being based on mastery of each concept. Does anybody know if I should just grab an open seat in another classroom? I have no idea how this could turn out.