My dad (slightly older) knew him from Pitt Law School back in the day and really liked him.
You couldn't not. Oh, I suppose someone who both disagreed with him and was determined to be hostile about it could have, but we had a couple of guys in my seminar who seemed to have taken it partially for the purpose of clashing horns with the PC Critical Race Studies guy. And he engaged respectfully with them, made sure they got their fair share of time to make their points and attention for their points, and still didn't let them take over disproportionately.
A good example of what a law professor could and should be: a serious practitioner who accomplished great things in the real world, and actually taught people how to practice, but was also unafraid to engage in really radical thought about the teaching, practice, and nature of the law.
I went to a small lecture series (like, a series of 3) given to a small group in my non--NYU law school, and he was great.
I had a somewhat similar experience in my undergrad senior seminar. Not as marked or consistent, but when one student gave a presentation that was an incoherent mess (though with plenty of interesting and useful information), the prof stepped in and helped him make sense of it without embarrassing him and in a way that engaged the whole class.
It's fantastic to see actual teaching, isn't it? Class lectures and discussions have their uses, but they aren't the same thing.