Had the pleasure of taking a course of his in undergrad as a newly decided philosophy major. The material was excellent and right up my alley, but more than anything I was stunned by how fluidly and clearly he communicated. Huge loss
I had the same experience, except I was definitely not a Phil major. He had a "class for every major" where we read chapters of the book he was writing (Toolkit for Thinking) and basically gave him feedback. It was an amazing strategy for him to get reviews on his book that way from totally non-Phil folks. And my name is in the book!
Great teacher, great writer. I took one of his undergrad classes, and one day I went in to his office hours to chat - I still remember how relieved he was that I wasn't there to try to debate with him about God, that I wanted to talk about something else! I think that happened to him quite a lot due to his reputation.