[{"observed_at":"2026-09-07 16:20:36.978964+00:00","run_id":"20260907T155543-ce3781c4","source_review_id":"UmF0aW5nLTI3NjA4MzEz","source_instructor_id":"rmp:2002789","instructor_name":"Mark Hetzler","course_label":"MUSPERF421","course_id":"MUSPERF 421","course_uid":"course_a8df98d8511573954e202977","review_date":"2016-12-22 23:05:42 +0000 UTC","comment":"Mark is an interesting guy. While he often provides good feedback, he also cannot handle when someone disagrees with his assessment. He finds it disrespectful, and he expects you to take his criticism (which is often as personal as it is professional) and refuses to hear a contradictory views to his own with an open mind. Other times, he's great.","source_url":"https://www.ratemyprofessors.com/professor/2002789","quality_rating":2.0,"difficulty_rating":3.0}]