It ain't perfect but the criticism of The Moon is a Harsh Mistress seems overblown to me. Then again it's my favorite book, so I'm certainly biased. The Professor, in my opinion, is not presented as being uncritically correct; the errors he makes and the fact that people do end up disregarding many of his thoughts/suggestions are important. Anyways, here's one of my favorite excerpts from the book:

"Manuel, once there was a man who held a political make-work job like so many here in this Directorate, shining brass cannon around a courthouse."

"Why would courthouse have cannon?"

"Never mind. He did this for years. It fed him and let him save a bit, but he was not getting ahead in the world. So one day he quit his job, drew out his savings, bought a brass cannon--and went into business for himself . "

"Sounds like idiot."

"No doubt. And so were we, when we tossed out the Warden."