At another blog, Troublesome Frog comments
I managed to get through a BS in economics at a non-Chicago university without Samuelson's text, but I believe I purchased three (!) Greg Mankiw textbooks in the process. While I have to say that he writes a good textbook, Mankiw is an economist's economist. He knows how to extract maximum producer surplus. I was half surprised that he didn't convince instructors to change editions halfway through the semester just to get another $140 from us.
FYI, for those instructors teaching intermediate macro this summer: The new edition will be out any day now
. Feel free to switch editions mid-course.