For me this was a delightful, though prolonged, read. It took me over a year to get through, taking it roughly ten pages at a time. It is as important as Thinking Fast and Slow, though less accessible to the average reader.

I'm not convinced by all of the arguments, but one doesn't need to be in order to see the overall picture and draw some conclusions. Even if his thesis—that the division of labor between the brain's hemispheres is directly reflected in human culture and differences between cultures—isn't perfectly true, clearly it's not far from the mark. The truth is likely far more fine-grained and doesn't always draw the boundary at the hemispheres. Somewhat glibly, I could say why not pit the cortex against the lower regions? Or (pick any brain region) against (pick any other)?

Personally, I've used this as a reminder to take the time to step back and let the mind examine/experience any given thing/person/problem in multiple ways, to process both the particular and the gestalt.