When I was an undergraduate, the "lower division", more introductory, required courses were taught by specialists in "Computer Science Education", whatever the heck that is. I hated them. They were ... useful, as a basis for everything later, but they weren't taught well and if that is all there were, I would be very unhappy about the time and money wasted. Then I reached the "upper division", mostly elective courses taught by active researchers in the given field. Sure, their lectures and such were not well polished and rather uneven, but their enthusiasm for the subject generally shone through and you could get more insight from a chat with a professor on a ten-minute walk from class than from any textbook you've ever seen.

TAs that could understand the material and see where you went wrong. Classmates who were challenging and who asked questions you never thought about.

The whole package is what makes it good.